Campers move. Everything on an open shelves will need to be removed before you take the camper on the road. Do you really want to do that every time you travel?

Agree with the above. NO open shelves in a camper. We have had several campers and I'd never have an open shelf in one.

If you can find a shelf with a bar but probably higher and not that deep so things can stay in place

Also I actually like your camper walls more than the wallpaper you picked

The coloring is nice I'd change out the shower curtain maybe like off white linen look

And id pick shelves that match the wood tones and not the industrial look

Be careful adding shelves to camper wall - may be difficult to secure them to the wall. And then you have the bounce factor going down the road. Add a picture or sign and call it done.

Agree with all cautions. Would not be attaching anything to camper walls that cannot be held in place by something like 3M velcro poster hangers or 3M removable hooks. When camper in motion nothing can be loose inside - everything behind a closed door which has secure latches or place in a bin on the floor. Even a shelf with a bar won’t work - stuff will fall off - think broken bottles with contents spilled all over everything or broken decor items. To add color to your bath, new shower curtain, towels, rug, stick on sign / art & done. Happy trails!

It also matters where you live since wallpaper does not stay stuck if the camper freezes over the winter. I aslo ageree with all the other things about the structure and storage.