I have a small slide-in camper that has a heat strip in the ac unit. It does OK but there is no thermostat . That being said, I also have a Pelonis ceramic heater in it. The Pelonis ceramic heater is a much better choice.
My Voltage 3905 has two Olympian Wave heaters. One 6000 BTU unit in the garage and an 8000 BTU unit in the living area. If I head out somewhere and plan to pay for RV Hookups I will take the Pelonis along with me.
2013 Voltage 3905
2013 F350 4x4 DRW
2013 RZR XP 900