Painting inside of 5th Wheel good or bad idea?

Some adhesives will bleed through a new coat of latex primer or paint.
When I paint walls that have been previously wall papered, I use an oil based primer. That locks any adhesive bleeding from coming through the final paint. You can topcoat with any type of paint on oil primer.

Since I've started using the ceramic-additive paints, I can recommend them, especially in areas that see high wear or use. The surface is much harder than typical latex or oil paints.