Hi Dennis,
I have a 99 beaver. When my chassis batteries were running down I found that my RV had a switch by the radio near the front door.
That said, stereo power... when I left it on my battery would run down in a few days. When I turned it off my radio would turn off along with the cd changer... only problem was that the clock would reset on the radio. But I use this to my advantage as I turn the switch on when I start my RV every week and use the time as a timer to see how long it has been running.
When dry camping for 3 weeks I kept the stereo power switch off and it fired right up.
On a related note I found out today that my solar charger was only charging my house batteries... but not my engine battery.
Hope this helps...
Jeff