Some coaches have a battery disconnect for the coach batteries, some do not. In your PDI, they should have told you where it is at if you have one. If you do not, you will have to find the batteries and disconnect them. You may want to install a battery disconnect switch, available at most RV stores, when you get a chance.
There are several parasitic loads in the coach, such as the propane detector etc that WILL drain your battery if not disconnected.
Good luck. and Welcome..
2007 Chevy 2500HD Classic LBZ Duramax/Allison (Stock)
2005 Bigfoot 1500C8.2 AWESOME