We use a soft shell RTT and do lots of winter camping, in cold weather we end up with moisture on pretty much all surfaces inside and out. We have added a diesel heater to the mix, and when running that all night there is no condensation on the inside of the tent at all, When we get up in the morning, if it is not currently raining or snowing, I turn the heater up full blast for about 20 minutes and that will dry off all the canvas inside and out plus warm it all up so it folds much better. We fold the mattress in half and move it from one side of the tent to the other half way through the 20 minutes so any moisture on the underside or tend floor will dry. Then fold it all up and we are done. If its pouring rain or heavy snow, we will dry the inside and fold it up then open it up at home if its nice, or take it off and unfold in the garage if it is not nice. (We do have a quick release system to remove the tent in less than 5 minutes without tools so setting up in the garage is not a huge deal, as not enough room to get in garage with tent installed). so far never had an issue with damp tent, mildew or smell.
