[KMayUSA6060]

I am a 2nd Amendment man, and last Christmas asked my now-fiancee for a fireproof safe for guns and other important documents. With guns, there is the issue of rust when it comes to storing them in a safe, so most people get a dehumidfier for the inside.

I got a second safe (identical) this Christmas for my cards, and was wondering if anyone else stored their more valuable cards in a fireproof safe. If so, do you use anything to keep moisture out? Does moisture in a safe even have an effect on cards?

Edit: I should add that I also keep a couple autograph memorabilia in this safe. Any fear of moisture in the safe damaging the autographs on the item(s)?