I just left mine for four days at Lake Isabella, running the reefer and sensors on dual Group-27 batteries. We had to come back for a couple of doctors appointments.
I just made sure they were well charged before I left, and this morning the battery monitor said "Good".
2005 Georgetown 342DS XL, Full Banks Package
2005 Liberty Renegade 4X Toad
1989 Wrangler Sahara Toad
1984 19.5' Beachcraft i/o 5.o liter, 4-bbl (and you thought your Moho sucked gas!)
D/W Carole and Maggie the Teacup Lab (Black Chihuahua)