Hi All.
We do mostly all Boon-Docking, both Summer and Winter also. We have used a "BUDDY" MR. Heater, for over 20 years or so. We also have a "Big Buddy" Mr. Heater" also, since they first came out.
We also use #6 Oly Wave Heater for over twenty years also. We never even use our RV's Furances over all of these years. I do keep them working properly, in case of an Emergency though.
We also have 4 EA "Ceramic Heaters" also. Got more than enough "Power" and then some for on Board. Just ta look at our Signature. We can run past our Motorhomes 30 AMP Limit anytime we feel like it. We never worry about how cold it gets. We have had over 25 years of living in real Cold, Snow Country, where the Snow doesent melt off for 6 months out of most years. Been use to minus -20 Below Zero, -30 Below Zero, -40 Below Zero and even lower. Getting a little to old to do that type of Winter Boon-Docking anymore. But the stuff that they have around here, is childs play. Good Luck. Happy Travels. Dan & Jill & our 2 "YORKIE KIDS.