Hi Stink:

I have used the Cabelas Alaskan model for severalyears with excellent results. I think the capacity is 5300 cubic in. I carry about 80 pounds and have never had problems, I go in about 7 miles for a week, to about 11,500'. I have always used an internal frame for "backpacking", but would not consider one for hunting. The gun carrier is great and the frame very durable, hence the 12 lbs.I also appreciate the integrated "water bag" with mouthpiece so you don't have to fumble with nalgene bottles/canteens while moving. Lastly, when hauling meat, the pack (sans frame) has built in straps and "becomes" its own internal that is surprisingly comfortable.

Good luck.
CE