Hmm. In the 2012 29.2, the radio is on the house battery disconnect but not through the ignition key. That way, you can listen to the radio while the coach is parked without the ignition on. Turning on and off the ignition doesn't affect it.
Not sure if something changed in the 2014 or not?
Colorado '15 Winnebago Forza 34T w/MKZ hybrid toad