In the 5-day Basics e-course, Jeff says that the water pan helps keep the temp under control and arguably adds moisture to the smoking process. I was thinking I might try this with my Traeger, but am under the impression that a smoker is designed either to use a water pan or not. Since the Traeger seems to be a "not", is this a mistake to try? There is a flat metal drip pan/diffuser over the fire box that I thought I could put a shallow pan on. It would get pretty hot and I am certain it would steam. It would be right under the rack. Has anyone tried this? Would it work? Does it make a difference?