We stay 6 mo. up North and 6 Mo in NC. We have our 5er parked on our lot and live in it when we are home. The first year we went up North we came back in October to find much mold in the RV from moisture build up. While a fan might help with circulation, you still might have problems in those hidden spaces. Last year we got a dehumidifier and also put the smaller air conditioner on the highest setting. I think 95 degrees. The slides are closed. The water from the dehumidifier goes down the shower drain and out through the grey water tank. Last year we had zero mold. This year we hope for the same. If you have someone you trust, have them check the dehumidifier filter 1X/mo. and just brush it off. The A/C filter hardly had any dust in it, because no one was living there. I expect the dehumidifier to be the same. Good luck. Keep that mold out. Believe me you don't want it.
