Having re-read Wind River AND CA Traveler's suggestions, I think I may go with that. That way I could go straight down trough the bedroom which is the overhang of the fifth wheel. I don't have a closet in the bedroom, but there is a handy cabinet right there next to the bed where the charge controller could be placed, then just drill a hole through the floor, which would have the wire come out right above the batteries. That would also have the advantage of being the shortest run. I do plan on using large gauge wire, but the shorter the better. Any thoughts? Would there be any problem having the charge controller that close to where we sleep?