I've had good success with Command Hooks in my camper and in the house. I've had the same Command Hooks up for years in my previous camper.
Now, I did have one Command Hook in my home bathroom wall, and after a year, the clock it was holding fell. The glue was still holding, but the paint gave way. So the paint was still stuck to the tape and I now had a white spot on my wall. I ended up a nail.
The other option is to use a hook - one of those Command style hooks, and put a drop of Liquid Nails behind it. But, it will never come off the wall then, unless you rip off the finish.