Trust me....there are areas that suffice for a gun cave in an RV. You may be surprised at how much firepower is in the RV parks.
And, RV doors have to be opened to the outside and are up off of ground level. Folks can't just slam themselves into a door and gain access. That gives us ample time to arm up. And besides, most people in RV parks are good folks. I'd say there are dang few bad ones.