Good thought Sudsy !
Perhaps my full sized diesel pusher coach has slightly more substantial ceilings, and of course it is advantageous to overall strength that the upper pole end fits only about an inch or two out of the corner where two walls meet, so the framing is right in that area. If I were to use a foot square thin plywood sheet, the pole end would be at one extreme corner, but that still might be a good idea. My towel pole has been in place for about 3 to 4 years of full timing with no issues (and almost all of the force from the added weight of towels and robes go DOWN to the floor.)
I am not familiar with the construction of the little units -- but in any case do take out a section or two of pole length to accommodate the differences between ceiling heights of a residence and an RV...you only need enough tension to hold it securely in place.
2007 Tour Master T40C
Acura MDX toad
"It takes a great deal of time to recover from any improvement..."