I'm the OP, here the results of our trial trip over Thanksgiving... (3 nights with hook-ups and 2 nights without)
I added a second cheap-o Group 24 battery to my camper, purchase 5 10-light LEDs for use in a few select over-head lights. And 3 smaller LED replacements for the bunkend fan/light combos. I brought along by Honda EX700c generator, that I ran for a ~2 hours each day, but I suspect I could have used it less if I had had a "better" battery meter to monitor usage/capacity. I also purchased a Mr Buddy Heater (the largest one).
- Turn off the "auto" mode of the refrigerator before starting the generator.
- My generator won't run our toaster. Never tried to use it with my wife's coffee maker as she switched to something instant from Starbucks a friend of her's recommended.
- The heater consumed both 1# containers over night and kept the camper (with the rear bunkend closed) at 55-58F when the overnight temps were near ~35F on its lowest setting with its built-in fan turned off.
- I really need to get pop-up gizmos. Bunkend condensation is the bane of winter camping in a PUP and/or HTT. Especially when dry camping (not using electric heaters). Even with the roof vent open an inch and a side window of two bunkends cracked a bit. The moisture under the roof of the bunkends was quite annoying.
- The 10-light LEDs were more than bright enough for our needs (especially when used in pairs). I plan to buy a few more to expand coverage (over dinette). The smaller lights in the bunkend light/fan setups were too dim to read by, but did kids though it was good enough for their needs.
- I pulled the fuse for the radio, but I wonder if the LED in the control center indicating a missing fuse doesn't draw more power. I don't know if this was the cause, but my water heater didn't work until I re-inserted the radio fuse.
In general I think we could have used the batteries more than we did and we ran the generator more than we needed.
The Elkmont CG within the Smokies was great we camped right along the creek. It was maybe 20% full (and 50% of it was closed off for the season). The kids had a blast and more importantly, my wife said "why don't we camp like this more often" followed by "I think we could do this for a few days." I just about choked on my Smore when she said that.