Note that in the Olympics, if you're above timberline or on the beach, a hard-sided bear canister is required. (At the beach it's raccoons, not bears, that are the problem.) I went through this with the Olympic NP folks last summer--they wouldn't let me use my Ursack. Below timberline, if you don't have a canister, you need to hang a bag 12 feet high and 10 feet out from the tree. (even if it's an Ursack). So whatever pack you get, make sure there's room for the canister!

Olympic NP backcountry food storage regulations
_________________________
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey