I have had a Generac 36LP since 2003... and have used it an the camper for 1318 nights. Never stayed in campgrounds.
My camper uses LP gas for the 6 cuft refrigerator, for hot water, and the generator. In hot weather we run the generator 24/7 when necessary.
I have two 30lb propane bottles. We have never had to fill them more often than every three weeks.
This information is accurate... no guessing or speculating.
Note: i would never use gasoline in a built in generator
Of course I’d never use gasoline in my truck.... I have a diesel truck.
I have no need to haul and store gasoline.
Sleepy