i use a pizza pan with holes in it(it came that way). since i've started using that my q has been better and fire control is better. no need for water pan. you will have so much moister you will not know what to do with it. i tried a soup can of water and wow i had so much moister that i had a puddle in the bottom of the uds. man these cooker are great and cheap.
JUST A LITTLE U.D.S. webber 22.5"