I have noticed some dampness and surface mold on the interior and the basement areas of the motor home. I cleaned the interior completely with a bleach solution. I keep one of the exhaust fans running...
I have found that the hanging bags of DampRid seem to work better than the tubs. You have to figure out how to hang them, but they seem to collect more water quicker (they also cost more in the long run). Just from very casual observation!