If someone wants to use a regular baseboard heater mounted to one of the walls, any standard 240V heater will work in the camper when wired for 120V (only one leg hot instead of both). Just remember, a 240V heater wired for 120V will be half the wattage.
I prefer a small fan forced unit because it moves the air around and helps prevent cold spots plus takes a lot less room. Though the baseboard heater is noiseless though a slow steady heat.
2015 Ram 3500 4x4 Crew Cab SRW 6.4 Hemi LB 3.73 (12.4 hand calc avg mpg after 92,000 miles with camper)
2004 Lance 815 (prev: 2004 FW 35'; 1994 TT 30'; Tents)