Storing car in enclosed trailer

This year I will be storing the dart in my 20ft enclosed trailer, One problem I'm
worried about is condensation from temp changes, went out the other day and the motor was covered in sweet from rapid temp change. Here in TN its been around 25deg at night and 60 deg during day. Anyone esle store the car in a enclosed trailer? If so is this a problem? How do you control condensation?

Thanks
Mike