For my 2008 Colorado DIY Elk hunt, due to airline fees/restrictions, we purchased BPS Redhead deluxe gear bags 32"x15"x15"(7200ci, 3#) In it I packed my Dwight Schuh framepack,a T/D Bob Lee recurve bow in a soft case, 7 arrows in a lite plastic tube, a sleeping bag, pad, all my camo and gear. (48# total) We also purchased a Igloo Maxcold 60 wheel cooler 28"x16"x17"(13#)to bring our camp gear (42# total) and use the cooler during the trip and to transport meat home. I also used a 2500" backpack as a carry on for my travel clothes,binos,camera, etc.
All bags/cooler worked perfectly and NO extra fees if weight stays below 50#