I have been using a counter-top model dehumidifier for the last six months in a very humid environment. I have set it up to drain into the sink. Because it is sitting on a formica counter-top, heat has never been an issue. In theory, wherever you put the de-humidifier the air should be equally humid or dry, so the only location issue would be heat or leaks. Since I started using the dehumidifier my bilge is dry between sails, and the boat seems less musty. I would heartily recommend using a dehumidifier if you have a/c power to run it while you are away from the boat.
New Orleans, LA