Stan,
Thanks for the input. The LPS approach coupled with replacing my unvented gas heater with a small conventional gas furnace stands to have the most impact on my situation. Another post also mentioned keeping the air moving, since I have a ceiling fan out there I'll try that too. Before winter I want to rig up something to switch on heat based on relative humidity and see how that goes. Since moving to the Arizona desert isn't an option, I have a feeling I'll be fine tuning any solution for some time.
Tom