I live just across the border from you in Blaine. I've used 2 " Air Dryer" brand heaters. They are kind of a flat pancake heater, a flat sheet of metal covered with a plastic dome with lots of holes to let the heat out. They don't get hot, but keeps the damp out and most of the winter keep it at about 50 degrees in our 27' trailer. They do need shore power to work. I think they use the same about of electricty as a 100 watt bulb I got mine several years ago for about $50 each, I think they are quite a bit more now, but worth it.
Those dessicants just don't work in our damp, rainy stinky area (why do we live here)?
