I never use water. Foiled clay flower pot base, with a layer of foil over the top of that. Cleanup is easy and I can run my WSM as high as I want. If doing chicken only, I will remove the clay flower pot base and just foil the pan. Easy to stay above 300° by manipulating the intake vents at the bottom.
Traeger Lil' Tex Elite, WSM, Green SS Performer, 22" OTG, hyperfast orange Thermapen. CBJ.