When you go to buy a pack frame, go to a really SERIOUS backpacking store and look around and ask alot of questions. All the aspects that make a good heavy backpacking pack desireable(padded and FULLY adjustable straps, waist belt, chest strap, ect) also apply to a frame pack for hunting, the only real difference is that you dont need all the fancy pockets and gizmos, just one large compartment. the alaskan series is pretty good, you can look at them and compare the others to it.