I'm sorry to hear about your predicament. Was your coach completely buttoned up (as in all vents closed) for the season? Mold is tough to deal with, especially when it gets in/on fabric furniture.
I've always been sure to put a few tubs of charcoal briquettes around the coach, as well as some small ones inside the fridge/freezer, to absorb moisture/odors as well as leaving the vents cracked open (we have MaxxAir covers on them) to provide some air movement. Knock on wood, we've never had a moisture problem, but, then, we don't try to heat the MH while in winter storage.
I know other members here have used with success dehumidifiers like this one
sold by RVupgrades to help with moisture containment. Possibly something to consider.