I pack with a Kifaru UL5200 with a few outside pockets. I drop the outside pockets and most gear at camp and cinch the pack up tight. Carries great (2-3/4#) and allows you to carry meat back. Packed my archery black bear a couple of miles to camp past fall, stashed him on the glacier over night, boned him in the morning, then out three miles to the truck. I shot the bear with the pack on.
Same pack performed great for a 14 day backpack stone sheep hunt that started out "heavy" with food. Why carry the weight of a second pack too? I use the gunbearer to carry my bow as well.
