Okay... It looks like it may be a little chilly in Austin this week. I figured out how to use my furnace during my last trip (but didn't really use it because it wasn't that cold), but there is one question I keep thinking about. If I am camping for three days, do I actually turn the gas on and off at the tongue every time I use it? Or do I just turn it on and leave it on for my stay, even though I will only run heat first thing in the mornings to take the chill off? Anyone?