Chassis Battery Maintenance - 2007 HR Vacationer XL

Mark and Bully, thanks for the wisdom. I'll plead guilty to not having called Monaco on this particular problem, probably should have from the get go. In the meantime, I'll investigate those nice new trickle chargers. Does the fact that there are two batteries in parallel change what would be needed in such a charger? Would one sold for consumer use be able to charge both at the same time, given they're in parallel, or would I just burn it out?