I put my meats directly on the rack, my GOSM has a water pan over the chip pan, so I just wrap that in foil ta hep keep it clean, filled with water an the drippins drop inta that, then evaporate back off inta the cabinet. Always a nice juicey product an flavor that won't quit!
Fer butts an briskets, I wrap in foil an place in a personal cooler, I don't use the towels anymore cause it's such a small space, then I can save any juices from the meat, put mine in a mason jar an let the fat seperate, then skim off the fat an add them fine juices back in after the pull.