Life saving advice
Thank you Forest River Forum whereas I was able to diagnose a "rotten egg" smell as potential battery exploding and secure the batteries from charging thereby eliminating unknown dire circumstances!
The Forum explanation advised me to check the battery, I did, and found vapor escaping from one cells cover indicating a boiling situation which would lead to an explosion and bad times thereafter!
Whew....service tech, two new batteries, cleansed air and we are back in business...thanks....
George( 2008 Georgetown 374)