Do you keep a dehumidifier in your garage to keep your classic car from turning into a pile of rust?

One thing I do, Wal mart, rural king, places like that, sell something called a moisture absorber, its about the size of a motorcycle battery, it's for the inside of RVs and such, I keep one in the car, it really helps cut down on your Windows fogging up, and sure it would help keep the carpet dry after a rainy/ snowy day, I also keep one in the gun safe( gotta keep yer powder dry)
you'd be surprised how much water it pulls out of the air in just a couple months