Good report.
If I was "camping" (many definitions) for a couple 3 days trying to make 2 batteries last w/o recharging, it "maybe" wouldn't kill me to do it,....even in cold weather. But it sure would throw a cramp into my "camping" lifestyle.
Back is the old.....and younger days, (when we dint feel pain) we did it w/o any batteries at all,.....probably defined as "real camping".
This day and age, if it was cold, and I didn't have catalytic heat, just the furnace and the tv/sat would burn my 110 (available) amp hrs the 1st nite.
Do I need solar.....or genset, ?? you bet I do ! :)