How to mount to thin walls?

Sometimes it helps to see what the RV builder used to mount stuff to the wall.

For towel bars, I made up some small spreader plates of thin (1/4" or so) plywood, looking vaguely like blank switchplates for lights switches, glued them to the wall (mainly to keep them in place while working), and then used plastic wall anchors through both the plate and the luan of the wall. My theory was that they would help spread the force of the mount out a bit and so prevent puncturing the wall, and the added thickness would make the wall anchors more likely to hold. Thus far it's worked out okay.

For many things, command strips would work nicely and be removable if desired.

mighty7sd wrote:
What do most folks here do when mounting something to their camper walls? Toilet paper holder, towel bar, pictures, etc? I feel like the screws supplied with most of these things would just go right through the wall. I don't actually even know what the thickness is on the interior and exterior "walls." Does not feel very thick. Double sided tape? velcro? Smalls screws?

For light things I use adhesive backed hooks, small stuff gets moved all the time anyway ....
The towel rack I bought one that slings over the top of the bathroom door.
For couple of things I have used very coarse screws just shorter than the thickness of the wall, which seems to have held up to moderate abuse.