I've given up trying to smoke in the cold. We have been dealing with 40 to 50 below wind chills here for more than a month now. I tried it on Super Bowl Sunday. It was actually in the teens above zero. I had a nice windbreak between the garage and the 3 season house where the smoker sits. It took an insane amount of lump and wood to try to maintain temp not to mention CONSTANT babysitting. Add fuel and the temp ran way up and then dropped off quickly cause the cold pulled it away from the smoker. Add more fuel and the same thing. Either hot or cold. Would never really settle down. No I didn't have a blanket or piece of carpet to use to throw over the smoker. Besides won't these things smolder and stink things up after being on for awhile?
Turned out a bad set of spares too. So to me the cold just creates another factor working against you (as if there aren't enough already) when trying to turn out a good smoke.
Besides I am just tired of having to go out in the cold. I think I am getting fed up with this part of the country.