About the bathroom fan....on mine, jf the vent is open a certain amount (not much) the wall switch doesn't work. Vent needs to be open more for wall switch to work, as opposed to using switch on fan. So, leave vent open if you can while camp'n, and use wall switch....must be a short person thing.
Bob/Linda, 99 Dodge 2500 Cummins,2010 8280 Rockwood Ultra-lite 5er, PullRite Superglide-----
I'm retired......but work part time as a pain in the ass!........... USMC.