We really need to add more places to hang towels in the bathroom, but as you may already know, it's difficult to mount anything like towel bars on the paper-thin hollow walls in an RV.
The right=hand wall by the sink has one stud where Forest River already mounted a towel hook. It was easy to remove that towel ring (assuming you already have the necessary Square screwdriver type), and mount the new towel ring in its place:
The left-hand wall seems to have only one stud, roughly in the middle, where Forest River already mounted another towel hook. But that one stud is useless for mounting a towel bar.
After considering various options, we settled on a floor-to-ceiling towel caddy
It's hard to show in one photo, so here's the upper half after installation:
And here's the lower half:
One nice feature is that if the towels seem in the way when you're standing (or sitting) in the bathroom, you can swing them out of the way, and they can also be swung out into the hallway so that they're easy to reach from the shower.