talk to me about built-in LP gennies...

My situation is very similar to yours. I go to drag races and park my camper in the pits while I race, then overnight in the pits or boondock somewhere nearby. I used to have an 1800 rpm Onan gas generator in my old race trailer. It was very quiet, and I would plug the camper cord into it and run the air in my Lance all day long. Fuel was cheap and easy to store and access. But if it sat for several months withot use, it needed work to start it . Then I switched to a Real Lite camper, and now an Arctic Fox. Both have built in Onan propane generators and a pair of 30 pound tanks. They always start, even after sitting over the winter. On the Real Lite, I stuffed some jute padding between the generator box and the inside wall of the camper, and it cut the interior noise to a very comfortable level. Initially, I was concerned about the fuel situation. But for weekend races, it turned out to be no problem. I never run out. This usually involves 2 to 4 days of travel, and 2 -3 days at the track. I do conserve: I don't run the air while traveling down the road, overnight if the outside air cools off, or if I'm going to be out of the camper for an hour or more. But restarting the gen and air is a matter of pressing a button, and it cools off in minutes.
It would be different if I was boondocking for extended periods, then I would want gasoline. So bottom line, for your use, I would recommend a built in propane generator, with a pair of #30 tanks.
Good luck, Joel