X2 on using the electric space heaters, we have a couple of them. If boondocking there's not much choice for heat except the propane central heater, then when you run the genny to charge your battery back up run the electric heaters and give the propane heater a rest. If you have a battery bank and solar to keep them charged during the day and have an large 3000 or 4000 watt inverter, you can run electric heat during the day and propane heater at night. We like sleeping with the heat set on 62 to 65 just add another blanket.
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000