Any suggestions on keeping the coach cool for passengers during the summer other than keeping the engine A/C fan on high and running the generator to use the roof unit?
Fill your water tank with ice and water before leaving. Get two or three or as many as needed misters and connect to the kitchen faucet. Put saran wrap over everything including carpet. Drill a hole at low point of floor that will fit a rubber plug. Wear bathing suits. I don't really think this is as good alternative to running the generator but might work. :)