Our cat rides free in the 5th wheel. It's a rough ride and he has a few hiding places that he stays at but he will use the litter box going down the road. I know it's stressful but it is better for him then riding in the truck. He has survived a trip across the globe that lasted 30 hours and I don't want to keep him in the crate unless I have to. Even lose in the truck he is not happy. This is our first year camping so I don't know what we are going to do in hot weather. I trying to find a way to run the ac going down the road.