I've had good luck w/ Grundéns 105 Liter Shackelton Duffel Bag (Amazon $120), and also Sitka has a nice version but more pricey. The Gundens at 105 L is about the right size for me as if I pack it, its about all airline will let me fly without paying overweight fees. Also, its a good size for the air taxi, bigger makes packing it in harder. The Grundens has a nice strap system for wrenching it closed when over stuffed and it stays shut. We bought two, and same ones have done 4 AK moose hunts.