DAYPACK

I've been using the Cabela's Rifle and Bow pack for several years. Cheap (compared to some) and works pretty well for me. The first time you start using a pack with a hydration system you'll never go back.

It's hard not to recommend the Badlands or Eberlestock packs as well. Yeah, they're definitely not cheap but when they do wear out you send it back to them and they repair/rebuild it for you. Basically a "lifetime warranty" so it'll last you.