I live in Montgomery, AL and we have the high humidity problem too. I keep the ac going, set to 85, and I have the hanging Damp Rid bags placed around inside. I don't leave any windows or vents open. Those Damp Rid bags will fill up in a few weeks and I just change them out. Buy in bulk at Costco! This has worked for the past 5 years for me.
I thought about a dehumidifier but was concerned about the need to have a drain. My concern was that if I drained it to the gray tank that it might overflow before I remembered to open the valve and drain the tank. Then I thought about a drain to the outside through a slide-out seal but nixed that because of the potential for ruining the seal.
Mel (Melanie) and Harry
2009 Tiffin Phaeton 40QTH
2014 Jeep Wrangler Sport