A Kifaru Duplex is most likely the best for what you're describing but a good backpacking internal is hard to beat. I've got several packs but end up using my REI XT85 for elk hunting most of the time. Packed out two elk with it this year and camps too.
Eberlestock Blue Widow with regular duffel and butt bucket. Eberlestock Tail Hook w/bucket for shorter trips.
My wife has a Crooked Horn Trail Blazer and a Badlands...4500 I think.
Check out the Rokslide forum. It's geared towards western backpack hunters theres a world of info on there. Whole sub-forum on packs. Badlands is not gonna work for that long a trip.
Backlands Superday is what I've used for the past 8 years. They have the best warranty in the business as well. The last pack you will ever have to buy. eBay is the cheapest place I've found to buy them.