What's the best 10-14 liter hydration pack for long days?

If you know of any streams or rivers along the way a pocket sized water filter can save you from humping all your water the whole way. Not racing situations but Chilcotins and LOTS rides are now 1/4 full bladder and/or just a water bottle with top ups along the way. 

https://cascadedesigns.com/en-ca/products/quickdraw-filter

Edit- didnt answer your question at all, also on the 2012 dakine pack but I'll do anything not to wear anything on my back if I can help it 

If you don't need 3L of water in it and can make do with ~1.5L of water, vest-style packs are awesome and don't move around at all.  You may or may not have noticed that as EDR has gone back to long-ass days on the bike, a number of the racers are running these now.  I like the Evoc ones (actually own 2 sizes for more/less storage capacity).  I previously owned a CamelBak Chase and didn't like how only 1 side had zippered chest pockets and had issues with stuff falling out of the non-zip side.

evoc trail pro

Big fan of the Osprey Raptor 14 here.

1. Jealous of the adventure, I've been talking about doing that kinda ride. Noticing that they have this Touring Club option now...

2. Big fan of vests now. I actually feel like it gives me better body composure and pulls my shoulders back into alignment. With in-frame storage(put beer koozies around your in-frame tool kit), I've been carrying less than before. While I have running one that works, if I was buying one tomorrow it would be the high above Vest Pack: https://highabove.net/products/supernatural-vest-pack?srsltid=AfmBOooLZ50m80F1RnXIPH4PxvLbdmepHAhYAaDnUYBVfuQsDu-qJqij

I was very surprised by just how dang good my Dakine Drifter pack was. It outlasted my usage of it before I got sick of the weird colorway and wanted to try something else. The bladder being positioned at the bottom always felt great too. I wouldn't hesitate to buy another.

Currently rocking this pack, bought 2 for $75 when Colorado Cyclist shut down. Also a great pack, excellent compartment layout, but the hose protrudes from a weird spot and I can feel against my neck sometimes.

https://www.jensonusa.com/Evoc-Stage-6-2L-Bladder-Hydration-Pack?srslti…

I luuuuuuv my USWE pack. It's the one called "Epic 8," which I assume means it's an 8-liter pack. It holds a 3L bladder, so more than enough water (for me, anyway.) USWE claims that their packs are meant to not hop around on your back, which was an important feature for me; I can't detect any movement or sloshing around while I ride. I'm sure other bike-specific packs are similarly excellent, however.
The only drawback is that with only an 8L capacity, you can't stuff a ton of crap into it. For me, it's enough. I rode The Whole Enchilada a few years back and was able to fit 3 liters of water, snacks, a multi-tool, my GoPro, a small tire pump, and my windbreaker in it. That was about the feasible limit though. 

Very jealous you’re getting to do Stone King, that event looks incredible. I’ve done a number of these style events and have tried most options for having what you need out there, hip pack to large pack and everything inbetween. I’ve found it really depends on the event- support, time of year/climate, are you finishing where you stay or is there a shuttle back, etc. Most of the time I’ll reach for a small vest style pack (I have the camelback Chase, the evoc looks better tbh), I can get enough in it to deal with some weather and there’s almost always a way to fill it mid day. I have had days in fall/winter events where I want to bring a small puffy for the inevitable hang outs in cooler weather, and for those days I’ll do something bigger- I have the evoc fr race 10l and it’s been plenty, but I really try to go with less when possible. 

For Stone King in Fall specifically, I would definitely want to bring a little more thinking of the weather- those look like some exposed mtns later season to me, but I’ve never been there so who knows? Better safe than sorry- pulling the puffy out at NAEC start lines this year got some real jealous looks and def upped the comfort. Might just rock the Dakine and have what you need? 

I used to use a Dakine mid-size pack to cart around water, tools, food and a Canon 7D with 70-200 jammed in the outer pocket. Even with just water and a tube in it, I had to crank down the straps super tight or it would slide around like crazy.

I did not like the Osprey Raptor series. I got one after the Dakine's back pad wore through, but it just never worked for me.

The Evoc FR Trail Blackline was great for big days when I was guiding. Water, tools, big first aid kit, food for me, food for clients, spare clothing. The thing was a bottomless pit. It was heavy and moved around a lot unless the hip strap was tightened snugly.

I moved on to the USWE Airborne 15 after the Evoc and never looked back. Carried everything that the Evoc did, but it didn't move at all. When fully loaded up, it will take a bit to get used to the feel of the straps, but they're easy to adjust whilst riding. I now ride with the smaller Airborne pack, with a 3L bladder, food, light jacket, tools and spares. 

I am a vest guy myself and I have a 1.5L (2.5L gear) camelbak chase vest (the original one, which is slightly better then the current one).  I recently got a camelbak chase 8 vest as a replacement which is a 2L bladder (6L gear).  I use either depending on the length of ride, combined with a water bottle on frame and usually a 21oz quick stow flask as well.  I prefer this setup because I like to keep 1.5 - 2.0 L of plain water, a water bottle with carb drink mix, and a soft flask with a sodium/potasium/magnesium mix (LMNT).  That way I'm carrying 70oz + 21oz + 21oz = 112 oz of fluid, without needing to carry it all on my back, or to create a gut bomb bottle that is drink mix combined with electrolyte mix.  I do also use a KETL canyon bib, which has 3 rather large storage pockets that I use to store snacks, and other smaller items.  

I realize you asked about 10-14L of storage... me personally I have found that around 5-6L of gear storage is typically enough for me for snacks, extra gear (gloves, windbreaker if questionable rain).  While I quite like the camelbak chase 8 vest, it moves around a bit more then the smaller camelbak vest.  I have recently tried on the From High Above supernatural vest, and while it's spendy, if I were buying today, it would be my choice.  Way better build then the camelbak options I listed above, and has better storage options and stays put more like a uswe pack.  

Regarding larger packs, I don't have a lot of experience with the current offerings, so I'll keep my impressions to vests and similar.  I mostly went to vest style packs as I have a bad back which required surgery years ago.  I find that anything substantial hanging off of my back really wears on my low back by the end of the day, and that tends to dictate my choices for on body storage during longer rides.  

I have the High Above Supernatural vest pack and can confirm it is awesome. I like High Above, a small business that makes excellent stuff in WA with clever design, high quality materials and great customer service.

I use a Vaude Tremalzo 10 with a 2L decathlon bladder. It has side pouches for water bottles, and can fit a hammock and tarp if needed.

You read a lot about the clever and great strap mechanism of the Uswe packs. I don’t agree. It desperately needs a waist strap because every time you hit a bump, or go in the air, the elacticized straps go launching upward. It epitomizes a dancing monkey. Wish I hadn’t got rid of my 2007ish Dakine that was held together with stitched dental floss. Regular backpack style or vest is the way to go. 

+1 for carrrying a water filter though. I like my life straw https://lifestraw.com/products/lifestraw-peak-series-collapsible-squeez…

I really like the USWE pack that I have (Airborne 3L Race), but it's one of the smaller ones that basically just holds water and has a small pouch for some nutrition and tools. Fine for a day of enduro, but possibly not for something like Stone King where you may need jackets and such. In contrast to the previous poster, I do think that it's very secure and doesn't flop around... but... it IS one of the smaller packs. I can't speak to the larger ones when they have a heavier load. As I'm sure you've read, though, they're usually considered the industry standard for people wanting a secure pack in MTB and moto.

I absolutely love the Raptor 14.  I have one that I only use for epic back county rides or for hiking the track on race day.  The wife has a Raven 14 (woman's version) and wears it every time she rides.  She likes to stick some slim cooler packs in with the bladder to have ice cold water all ride. lol

A buddy with the smaller one loves his, too. I think it’s once you load it up it becomes problematic. 

I had this one, or maybe the version just before it. 

I didn't use the tool roll - my pump was too big for it, I couldn't fit a tube in there easily, and I kept a mini-tool in one of the little hip-strap pouches to avoid taking off the pack in the first place. The pack moved around at least as much as the Dakine did when loaded up. The tiny waist strap didn't do much. The shoulder straps were fine, and the back pad was as well. Pocket organization was okay, except for the small side-zip stash pocket with the key clip. If I forgot to zip it up, stuff would jettison immediately [user error 100%, but top-entry pockets mitigate my stupidity]. 

No issues with material quality or durability. Comfort was fine, but that's a matter of personal preference.

I've been using a Dakine for years too, maybe 15 years and it's held up. It was meant to carry a chainsaw so you can imagine it was BIG. I finally found the USWE and it's been amazing. Totally stays in place and has enough room to hold what I need. I didn't realize how much hotter and consuming the waist belt of the Dakine was until it disappeared. 

https://uswe.com/en-us/mtb-hydro-9l-hydration-pack-bronze

I'll chine in with the POC Column VPD. I've used this for a few years and it pretty much my daily driver. I'm a firm believer in wearing back protectors as much as possible after some pretty bad wrecks, and I attribute this pack to saving my spine from a pretty serious issue after a pretty bad wreck I had this spring. The helmet cary is pretty good, the storage is smartly laid out and it cinches down on your back quickly before a race run which keeps it pretty stable.

https://poc.com/en-us/product/column-vpd-backpack-13-uranium-black

As long as your current pack doesn't bounce around too much and holds everything you need it to on a big day out, then it sounds like you don't need a new pack. But if you're really itching for something new, I really like my USWE Outlander 9. It holds everything I need to be self sufficient on a 10k of vert day, and stays put enough on rough trails. Their marketing will tell you that there's no bounce at all, but you can definitely get it to move around a bit on properly rough trails. Overall I strongly recommend. 

only if you're tiny, one size fits not all, a 46cm long back protector is way too short

Also interested in what the crowd recommends along these lines. After suffering through a few days in the Chilcotins with a bad backpack this season I am also looking for something in the ~20L range for epics. Seen a few positive reviews and some folks using the Osprey Talon packs but wondering if there are better vest-like solutions to this rather than going with the old style backpack.

the large one goes down basically to the bottom of my rib cage and I'm 1.83m (6') which is about the same as most back protectors on the market. But I agree, for bike park days I use a longer one, but something is better than nothing IMO.

I have an older version of the Vaude Uphill 16 that has more mileage than any of my bikes, as I pretty much always ride with a backpack (overprepared is my 2nd name). It's proper light for a 16L and I've never felt that it moves around too much, granted I've never tried it with a water bladder. 
The downside to being light is that the back isnt that reinforced, so if the pack is really stuffed full you better move the soft contents towards your back.
My opinion is based on the fact that I got mine for less than 40% of the current MSRP... 
https://www.vaude.com/int/en/16128-uphill-16-lightweight-backpack.html#…

I've done a stack of multi-day enduros, both racing and as a volunteer marshal.  The trusty Camelback MULE does the job pretty well on the days you're out for multi-hours without going near water/food stops, but I've recently changed to an EVOC Trail 16 and its pretty damn good (marshals have to carry a stack of extra gear).  It has a back protector, and my favourite feature - pockets on the waist strap so you can retrieve a phone or snacks without taking the whole pack on and off.

The Stone King is big days without much access to support/water so you probably have some essential gear to carry for the event?  Rainproof jacket, first aid etc?  Or are they running it pretty optional for that stuff?

If there's plenty of food and water stops AND you have frame storage options for a tube, the vest style Evoc Hydro Pro is brilliant.  1.5L of water (plus bottle on bike).  Very stable for racing, and enough room for a small jacket and some spares/snacks.  The front pockets again, are brilliant for snacks and phone etc.  The Camelback Chase vest is another option but the zips on that seem to break waaaaay too easy.

The 20L zone is where I start to shift to non-bike packs. Something like a Dakine Heli Pro is surprisingly good at keeping the weight close to your back and not too high. It has just enough hip belt to provide some control. The Evoc Blackline I mentioned earlier is ~20L, wide and quite flat to your back with a substantial hip belt. I dislike using hiking/backpacking packs for biking, as they inevitably hit the back of my helmet due to their being narrow and tall.

I have an evoc stage 18 that I like. For blind enduros and big days I prefer to put knee pads in my bag for the climb as well as carry a rain jacket and plenty of food. It does that well.  I use mine in the backcountry and have excessive amounts of extra gear on it too and holds it all well.  It also will carry a full face on a climb and I used that feature a lot in the 2 trans races I did (Sierra Norte and BC). 

It’s a good pack.

Personally I’d add a frame bag on for your tools and spares and put clothing etc in with your bladder on your current pack.

Not really answering your question but.... I have been carrying this collapsible water filter/bottle in my butt bag and its really helped me carry less on longer rides.  Going to new riding areas can be difficult as you don't know if you will be crossing streams, so might not work for you on your rad trip.  Also getting fully blinged out with all the oneup EDC tools has made it so I have no more tools in my bag, while carrying more then I used to.  Especially if you can strap a tube and good tire lever to your frame as well, the EDC tire lever I don't trust.  Obviously water will be the heaviest thing in your bag, but I find that getting as much weight as I can off my back has helped with comfort on longer rides. 

I used to have the larger EVOC Stage bag that was nice.  Mainly because the waist belt was really wide the whole way around, almost like a lifting belt.  It meant you could wear it loose but it would keep the bag in place while pumping.  It also had a semi back protector thing built into the pack.  

Either way have a rad trip!