Like the song goes Bruce, "It takes me all night on to do what I used to do all night long".
On the trailer side of things, I have done 3 nights and hardly put a dent on my batteries. We did not use the furnace though, just the pump, stereo, fan and lights (non-LED). I do plan on getting some LED's soon though, especially for the high usage spots.
For water, I will take along a big jug. It is handy for use outside too.
2017 Escape 5.0 TA (someday soon, I hope
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln