You doing Muir Trail???
Tanka bars, much better than jerky...
http://www.tankabar.com/cgi-bin/nanf/public/main.cvwElixir for your camelback...
http://www.rei.com/product/752086/camelbak-elixir-12-serving5 days is a long time and your going to need lots of calories and carbs. I'd take a salami, some cheese that doesn't need fridge, some powdered milk, for extra carbs on multidays I like to take something like augreten potatoes. Just buy store variety, ditch the box(but keep the directions), and use your powdered milk in place of fresh milk. Take some bananas but eat them first as they will spoil first. Quick rice is good to take too, yea it's a grain but it's pretty benign as grains go.
Take lots of pics. I love Muir and PCT.