Battery Disconnect Switch

You are correct in being concerned with battery power draw while in storage. The disconnect switch should be in the off position. This does not turn off the lp detector. That is hard wired directly to the battery with a fuse near the battery. Each manufacturer may be different, but Federal regulations require the LP detector be hard wired directly to the battery. Slides and other items may be activated with the power switch in the off position. But they do not drain batteries until activated. The other option is to disconnect the battery and make sure you care for the battery to avoid storage drain. I charge my batteries monthly from the on board generator and perform other maintenance.