temp control

Hello all, I got my first WSM this past July and have been learning a TON. I've been cooking in all kinds of weather and temperatures, too. Are there any 'rules of thumb' for adjusting to the outside temperature in order to maintain smoker temperature? For example, what percentage faster does...

Fellow BBQers, I am looking to purchase an ATCU for the purpose of overnight cooks. I do not use water in the pan so my temp can swing a little bit in the 18.5 WSM. I do not mind a little 20-30 degree shift but not quite comfortable with going to sleep and leaving it. Would also like to use...