i put 3 containers of DAMP RID into the RT which RT is kept in my garage in subfreezing temps from 11/15 thru 4/1. damp rid comes in bulk, you put a couple oz. into plastic containers and it aborbs water which h 2 0 you then throw away. 1 goes in the rear bunk area, 1 is on galley counter, 1 on dash. keep closet doors OPEN w no clothes, towels, bedding etc in them. turn on ceiling fan, stove fan, heat pump and shorepower every 2 wekks at which time you start the gen. ( i leave the gen run 15 min or so in my garage -- which sure kills any mice thta may be lurking. )