John,
I like the way you think...I am going to do some smoking to kick off the NASCAR season too. Like you, I cook in very cold temps all winter. Not sure what kind of jacket you have, I have a water heater blanket that I bought at home depot for 16 bucks and it is amazing, I very highly recommend it! I have found that once I fire up the smoker (use a little more lit charcoal and the minion method) and throw my food on, the insulation from the blanket makes the temp rise steadily and quickly so watch it closely and be ready to close the vents down. Once at temp, as long as the blanket satys on, you will be amazed how stable the temps stay and how little fuel you burn through. With the blanket on, the cold temps wont make a bit of difference, just keep it out of the wind. happy smoking and enjoy the race!
Smoke on
hunter