RV LIFE Forum Hub, Wander The West
Camping with Cat
Stick the litter box in the camper, lock her in for a night, at home. Familiar smells and all.
I know some RVers (Class-A) that have an RV cat. She leaves the RV at campsites, but always stays close. I think they got her as a little kitty and they're full-timers so it's all she's known.