Terrible condensation/mold? What to use to prevent

Mold only grows where the air is damp. Trailers are not air tight nor can they be made air tight. Dehumidifiers pull a ton of water out of the air. Rid-ex or rice or whatever...….not so much.

IMHO a dehumidifier is your only option unless you want mold growing in your trailer all the time.

PS it will grow where you can't see it or even get to it. IOW's mold is REALLY hard to get rid of.