I just picked up a dehumidifier to protect my collection. I have everything in a small room with the door always closed. What do you guys leave your dehumidifier set at?

Relative Humidity set at 50% should be fine. 

Right after I read this I went down stairs to get a dehumidifier.. lol my guns do get a little surface rust but it comes off after you clean them ..I hope the dehumidifier works.. I wish i had a safe but for 800-1,000+ I rather Buy another gun.. I have a small safe for my ammo soo..  

I've been running mine at 60% for the last few years with excellent success.  I read that Cabela's tries for 65-70% in their gun rooms.  You don't want it too dry.  Ed.

Just curious, why not too dry? I know that it's not good for humans (dried out nasal passages and stuff) but I would think for a designated gun room the drier the better, no?

Wood tends to crack.

Gotcha, makes sense.