Honda 2000 will do the trick!
We have a 2015 Rockwood 2504S, and power it with a Honda 2000 generator. This generator powers everything but the air conditioner. We may add a second Honda 2000, which can be connected to the other generator providing 4,000 watts of power. This would enable running AC.
Compared to most generators the Honda is quiet, and easy to start. I haven't timed it, but have run the generator for at least 4 hours before I had to add fuel.
Even though the generator doesn't make a lot of noise, I am still looking for an enclosure or a design of one that will significantly reduce the noise without overheating the engine. Why? I was a tent camper for 40+ years, and I use to hate listening to RV generators run in a beautiful forest. We run it minimally...mainly to keep the battery charged and run the heater on really cold days.
2016 Ford F150 XLT Supercrew 3.5L EcoBoost (Twin Turbo V6 w/Max Tow)
2015 Rockwood 2504S MiniLite