When we travel - full time or otherwise - our cat is with us. Our first big mistake was letting him ride in the trailer. It has three slide-outs and he hid in the bedroom slide-out and didn’t come out for three hours after we parked. Of course we didn’t know what slide he was in so we just had to wait. Even his most cherished treat would not get him to budge.
Luckily we have a large crew-cab dually that allows us to put a rather large tall gage back there along with a covered litter box, food and water. He has learned to ask to leave his cage when he has to use the litter box. Otherwise he is very acclimated to the cage.
Sometimes he is frightful on bad roads. So we carry some light tranquilizers we got on prescription. That way if we cross some borders we have proof of what’s in the bottle. We always have his papers with us and have never had any problems at border crossings.
Cat PIXFastEagle