Welcome!
So i have an 8ft bedroom with a propane fireplace, and i am noticing that to be discreete i can hang out in there because it is better insulated than the rest of the bus where i have the wood stove, which heats that larger area well but smoke shows at the chimney.
I am wondering if a bedroom area that is absurdly insulated for those extra cold days, and maybe plentiful insulation in the rest of the bus... or absurd amount of insulation throughout. Lol why not, right?
Also a few different heat sources in case. I have 3.
Good luck! Excited to see what unfolds for your needs up there.