Newbie here. I've never boon-docked before, and was wondering how long I can have the lights on in my TT before the battery gets to a critical level (from what I've read below half way charged is bad...
My experience is a single 90AH group 27 battery will allow us to watch TV using a 100W MSW inverter for a few hours and run a small 12VDC fan in the bedroom all night. We turn a light on when needed, use the water pump sparingly when needed and have the fridge on propane with the heat strip enabled. The battery measures ~12.2V in the morning. Your experience may differ.