I usually take two packs with me. One of them is a carry on 72 hr 5.11 pack, I pack my meds, electronics, small toiletries for the trip, and an extra change of clothes, just in case my suit case doesn't make it. The other pack is a 5.11 day pack, and that one is only used in camp, and I normally put in my camera, extra ammo, gloves, beanie, etc. It serves also to put my jacket as the day gets warmer. That pack goes in my check in luggage. I never use my carry-on pack while hunting to prevent any issues, just in case an empty case or cartridge somehow got lost inside and it's found by security at the airport. I've read too many horror stories, and I don't want to be one of them.