I don't have cats - but have a Class C; and can see the advantages of being able to stop for a snack break/potty break, whatever - and never having to open the door to go outside (and having a cat escape). I guess one could tape something like hardware cloth (metal screen) over the existing window screens to prevent holes (they make metal screens/grates that can go over the screen door). But if you have a cat that can bolt through an open door - you'll need good ID on the kitty - and some sort of system to make sure that never happens (like never opening a door until Houdini is in his crate). And if it was *me* - I'd be training the bolter to not do that? I'm thinking "hubby opening door at home and as cat zooms out - I blast it with a Super Soaker water gun". There are SO many things at campgrounds that are NOT cat-friendly, like big dogs/cars/wildlife/etc
