Suggestions on Garage Dehumidifiers??

[LRg3Nchrge]

Okay I've seen many posts talking about classic/vintage cars... How do you guys take care of them out here on the East Coast?? I have a 57 Chevy Belair Wagon that has suffered through it first humid summer out here and being from Cali I don't where to start to protect it as my poor baby is being ravaged with mold. I've looked at dehumidifiers but don't know where to begin to get one for the garage. It is definitely not a tight seal, old wooden doors and all, initially I was thinking something to put inside the wagon to at least get started?? Any thoughts or tricks of trade to help??? I know winter is coming up but I'd at least like to be prepared come Springtime...