While this is cute, I cannot urge you to strongly to not allow the cats to roam freely while away from home.
Every, and I mean every, person I have known that allowed their cat to roam away from the rig has ended up losing the cat.
Between not knowing the area, and the higher number of predators "out" in the hills/woods/etc the cat either runs away, or becomes a cat-snack.
One of my regular (membership) campgrounds worked with the local Animal Rescue Family to capture a members stray. The family was heartbroken and left contact info with the campground, etc. Unfortunately they couldn't find the member to return the cat as the number was bad or disconnected, when they caught the cat 6 months later.