Most of the walls in motor homes are fairly thin wood. (less you hit a stud, which is a good thing) you can use a stud finder to look for studs, if you find one great.
If not you can push a standard phillips head screwdriver through the wall easily, this will poke through the paper thin wood nearly as easy as it would typing paper, but it's not sharp enough to pierce wire or plumbing. Then you can shove in a hollow wall anchor and screw things down again you can "Blunt" the screw (when using the anchor) if you feel the need. by using a Dremel on the pointed end.
Home is where I park it!