We tow the "Mothership" with the propane "On" so the beer is cold.
The generator "ON" so we can run the AC for the 6 search and rescue dogs we have travel in the garage portion. We run the AC "Flood Dump" and use a floor fan to blow the cooling air aft. The ceiling fan is on in the garage in addition. When we arrive, the dogs are cool, the beer is cold. If folks are afraid of propane, you'll never set butt in the Hydrogen Fuel cell cars of the future.