Here's the dehumidifier that I have for camping in cold weather ( March,April, late sept. Oct.). My first trip was just like yours so I can relate 100% and I was thinking just what the heck did I get myself into !!! But now that those little bugs are worked out we couldn't be happier.
It's called EVA-DRY. Model EDV-2200 believe me it's just the right size and very quiet. Go to www.eva-dry.com
for info and where to see and hear one in your city. I Think it was $89.00
I placed it next to the dinette to give you an idea of its small size.