We recently purchased a Northern Breeze screen shelter on a Black Friday 25% off sale. I've read all the reviews about it trapping hot air and being excessively warm with the flaps up and the screens down. Frankly up here in the Great White North that is not really a concern of mine. Maybe when we travel south but for that I have other options. Anyway I'm more concerned about the lower end of the thermometer. Has anyone used a NB tent with a propane fire pit inside. We do most of our camping in the spring and the fall to avoid summer crowds and the one or two weeks in July and August where it may get above 90. This fall there were a few weekends camping where inside Xanadu was fine but outside cooking or just sitting and watching the world go by things got a bit nippy. I'd be interested in folks experience in keeping warm at the campsite in colder weather.