Best way to remove moisture and mold in car?

Recently I went to check on my 67 barracuda. It is in a storage unit inside a storage facility. I noticed that there was some mold buildup and it was very musty smelling inside the car. I plan on going this weekend and starting the car up letting it run a while and taking it out in the sun to dry. Anyone have any suggestions on what can I put in the car during long boughts of storage to prevent humidity and mold. I did find something on line called Damprid which looks promising.

This works well vvv.

I have a friend that professionally shrinkwraps heavy machines to ship overseas. I asked him for advice on storing metal things in my cold shop during the winter without getting condensation on them. He told me that he has had great luck with BBQ charcoal.

When I was a young fella I used to work for Mayflower as a driver/loader. We quite often picked up whole households and put them in storage sometimes for a couple years at a time.

We used charcoal (the basic charcoal NOT the self lighting stuff) we would purchase ladies nylons and cut the legs off and put charcoal in them and tie the end up so it stays. We would put a small amount in refrigerators and then a leg in the storage box itself before closing it up and stacking them in the warehouse.

Charcoal works surprisingly well, I have opened fridge doors after 2 or 3 years and there was never any mold and it smelled fresh. Customers would often comment when we brought their fridge in the house, "I bet it's going to stink inside". Nope, never happened, it works well.