It's either in storage... being prepped for a trip... being driven... or camping... So guess the house switch is on when not in storage...
But... leaving the house switch on WITHOUT shore power for more than a few days (and no other means of charging - solar, etc) will drain the house batteries...
The radio is a small draw.. Add in the CO/LP detector, fridge controls (unless off), furnace blower (unless off), any 12v electronics in standby (or worse on...) any lights you might have left on...
I know I can dry camp for 3-4 days... I know leaving it in the driveway for a week without shore power was too long..