Planning a trip to northern Tenn. this winter, temps in the 30s currently. Been reading a lot about what you guys are doing to winterize your trucks. This is where I get a little ignorant. Being from Florida as you can imagine I dont have to deal with this problem. So, my question is will I have to worry about the gelling of fuel ect. . that I keep reading about, & if so do I plug the truck in over night, add some thing to the fuel? Or is it actually when the temps reach the teens that you should worry?