I use a large UHaul moving box to cover my smoker to eliminate any wind issues.
You can also wrap the smoker in a large blanket to retain heat.
"...Best Buy sucks. They suck it long, and they suck it hard." - JazzyBadger
Bandera, M-BGE, WSM, Gold Kettle, Kenmore Gasser, 36Qt Turkey Fryer, ECB, Dutch Oven