I just did a little quick research on the web about clothes dryers and carbon monoxide. Electric clothes washers would follow your assumptions, dcarch, but gas clothes dryers would not. It looks to me that a gas dryer could in fact be a real danger.
Interesting thoughts on the moisture issue. As to the heating it still seems to me that you would have large swings in temperature, but hey what do I know!
Kurt--- who is living in Colorado, wishing there were enough clothes dryers in town to melt some of this dang snow!