In my full sized diesel pusher, the bath has only a small towel ring. What I did was put in a tension pole towel rod "tree" that runs floor to ceiling in the corner where the toilet is -- this lets the towels to go on the cantilevered rods and hang near the wall, but they can swing out to allow for faster air drying after use. The one I have is by Zenna, and you can remove a section to accommodate the reduced ceiling height of an RV.
https://www.walmart.com/ip/Zenna-Hom...10070301008005
Chuck