Well first, I'm talking about parking lots in November. Not campgrounds.
Secondly, I'd love to run the whole thing off battery, but I'm not seeing how. So if somebody can show me how to do it on battery I'm all ears. My big question for this particular trip is how do I recharge it if not with a generator?
Solar is great in theory, but 2 problems 1) I'm driving during the day and stopping after dark and 2) counting on solar in November in this part of the country seems like a bad idea.
Even if I invest in the kind of battery capacity that will let us run a 300w inverter for a couple hours in the evening plus run the furnace all night, I can't imagine I'll get more than 1 day of that with a battery setup up, will I? 300 watts for 2 hours would be about 60 amp hours, wouldn't it? Can I get significantly more than that with a 2 12v parallel or 2 6v series setup?