Really depends on where you live. Right now I cant cold smoke in my WSM as the outside temp is still getting up to 80-90 and thats going to melt the cheese inside. Last winter I was able to cold smoke some when the temp was cooler and just threw in the AMNTS.
I normally can’t cold smoke where I live with a WSM this time of year. I did read the other day about a guy that froze a couple of two liter jugs of water and put them in the water pan. I normally just wait until November until I smoke cheese. Vacuum seal it and give it away for Xmas presents.