In the WM quality category, I'd check out Kifaru. The Late Season might work for you as could the Siwash. They are great for general backpacking but especially tough to beat if you are adding carrying meat to the to do list. I've packed an entire boned out deer in a Late Season and wouldn't hesitate to strap on an elk quarter if that's what I had to do although I'd prefer their full sized pack such as those based on the Long Hunter frame for that sort of thing. I once packed out -- only about a mile -- a whole deer sans hide, head and lower legs on a Kifaru Predator frame. It wasn't much fun but I know the packs will carry much more than my legs can. Bulletproof and excellent customer service.

kifaru.net