I installed the following ceiling fan in our RV (they have a larger size if you can fit it).
https://www.rvandmarine.com/product/...v-ceiling-fan/
Our RV had a ceiling light, so it was a simple job to replace the light with this fan. I did have to make a wooden plate to cover the opening left by the light which I then mounted the fan to. This unit is controlled by the remote, so no additional wiring was needed, I just leave the light switch on. If you have a bedroom slide, make sure you have the required clearance when the slide is in.
The DW didn't like that we no longer had any ceiling lights, so I added these on either side by tapping into the fan wiring.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
So, I always leave the wall switch on, control the fan by the remote, and turn the ceiling lights on manually when needed.