I wouldn't worry about the generator, even an open frame contactor type, the other hunters will be running ones as well.
How about elk/moose in September in northern BC ? Every year we have frost. But the worst hunting camper experience was when I won a lottery for a November doe tag one year during a nasty cold snap in the high country. Then we ran the genny, a quiet Yammy to power the an electric heater and the furnace, and still froze up. We were OK we had a heavy sleeping bags. BTW cold comes up as well.
I just changed my furnace in my hunting camper, a '99 stick and tin, from the 12,000BTU to a 19,000BTU. More sized like a trailer. Last September, cutting my hunting trip a little short, the old fan packed it in, squealing like a stuck pig, making sleeping difficult. This will up my power consumption to two batteries a night from the one. I have two #27s. This leads into the problem of restoring the used power, most trailers have poor performance charger circuits in their converter/chargers. On my camper it's a measly 10 amps. On our TT, I up graded the charger side, so I didn't have to run a generator all day. I see something like that in the future of the camper.
Unless it's really cold, I shut the genny off when I go bed, turn down the furnace to 50 or 55 and sleep under heavy blankets, or a down comforter . If really cold, I run the genny all night with an electric as well. I give up on running water and use a blue jug and an outhouse. In the morning first thing, even before getting dressed is firing up the genny. It's hard to get enough genny time. And then you can crank up the heat.
I would avoid propane cat heaters, they dump lots of water in the camper and use oxygen requiring open windows. I say this from a bad experience in a wall tent. A wall tent doesn't have sewn in floor so does have drafts, yet when I pointed the dish inside when I was cooking breakfast, the boys got up very drowsy.
Solar in winter ? a yellow spot on the horizon on that rare day it's not clouded in.
Adventure before dementia
