Years ago, I had a cat that I took camping with me. We camped in a tent. Is that what you are doing or are you going in a camper/RV? Our tent had a section separate from the sleeping area where we put a litter box and her food and water. There was a big window on each side of the tent with a flap we could tie up leaving just a screen. The front of the tent had that as well, and that one went all the way to the ground. When we were around the camp site, she usually stayed in the zipped up tent with the flaps up. There was plenty of air flow, and she could see out. If we left the camp site, we took her. I had a harness with a leash, and sometimes I would let her walk around. She was such a good cat to travel with. If I tried this with my current girls, I am sure it would not go over well.