I am in Miami and I have the Golden Rod combined with rechargable silica gel based dessicants. The Golden Rod supposedly works by forcing the moisture out by heating the air inside the safe. Despite that, the rechargable dehumidifiers seem to suck up enough moisture to completely change the color within a few days. They claim that it protects for 30 - 60 days without needing to be recharged, but the color indicator turns way before that. I use two of them in my safe and I charge them one at a time.
http://shop.sportsmansguide.com/net/cb/cb.aspx?a=180353
I have used the hanging
Damp Rid Hanging Moisture Absorbers before, but I am worried that one of them will leak. It worked for a while before becoming totall saturated.
What worries me the most is why the Golden Rod doesn't do a better job. I sure that just opening the safe lets in all of the moisture and all of that moisture needs to be sucked up/pushed out.