I keep a couple of small fans in the RV . I us them inside and out
Sometime I need to blow the cool bedroom air up front
While I don't think you will put to large of an A/C in your RV this
reminded me of a man I worked with yrs ago .
He had an A/C in his home that was way to large for the home .
It would get really cold but they were still uncomfortable .
Finally an air cond man explained to them that the unit should be
properly matched to the area and heat load otherwise it will not
run long enough to remove the nasty Texas humidity .
That was it they were cold but clammy feeling .
On the other hand if the unit is to small you may never get cool .