As far as packs go, does anyone have experience with Gerber Hydration Packs. One of the sites I buy from, bladematrix.tv, had some on closeout so I ordered a couple of the Evader model. It's been quite a while since I hiked, but back when I used to outside San Diego, I went through a lot of water. I'd go through two canteens, a two-liter, and sometimes any extra water that my friends would offer. I'm a big guy and I sweat a lot in the heat -- it's not necessarily as hot where I live now, but I haven't forgotten that it's important to carry water.