I have a related question..
What hunting back packs are out there that have enough space for long wilderness treks (5-7 days), also compress or detach into an effective daypack, and then function effectively as a meat hauler?
I know of the Eberlestock J107 pack, but that tops out 4500 cu in, which might not be good enough for a 7 day mountain trek. Also I heard that it gets pretty unwieldy with the rifle in the scabbard because the center of mass is too far from the back. Does anyone have other suggestions?