Uunexpected water in heater and batterydrainon 19 ft. Serenity AS?

I left the sprinkler on it was hitting the side of the AS before I caught it. The heater is a Hydro Flame furnace by Atwood. I am sure that some water must have gone in the heater exhaust vent on the side of the AS. I can't detect any water even when I slipped a soft string down the out side vent and there does not seem to be any water on the inside. I have not turned it on yet and not sure if I should? Also my batteries seem to drain when the switch is in the power off position. I would appreciate any help. BillbB bbtyrec@cox.net