Gonna be in a tent this weekend for deer season and it is supposed to be pretty cold. Has anyone ever used a portable propane heater in a tent? I have a Mr. Heater Portable Buddy brand heater that I have used outdoors for trout fishing and it works great. I am just a little leary about using it in my tent, even though the specs say it is ok for tent heating. In my younger years I would not have thought twice about it. Just fire it up and let her eat. But now that I am getting older I am a little bit of a woose, or maybe just a little bit smarter. I know you have to open a screen to provide proper ventilation. I am more worried about a fire in my tent. The manual does say to not operate while sleeping but that does not do much good . Any thoughts?