I am going to smoke a 9lb and a 8lb shoulder but also have a 6lb butt. I will be making pulled pork with these.I'm going to use Jeffs rub and sauce.The question I have is cooking time. I know it's roughly 1.5 hours per pound so my 8 and 9lb shoulders should be finished about the same time but the 6lb butt will cook faster. My problem is the smoking time. I've been told that roughly the first 3rd of the cooking time is how long to smoke the meat but since the butt is going to cook faster what should I do so it dosen't get over smoked or will it be fine because all of the meat will end up mixed together. Also should I foil the meat or not and does it need anything such as mopping while cooking. This is for my neices graduation party so I need it to turn out tasty.By the way I use a horizontal charcoal grill with the side firebox. I did'nt know if maybe I kept the butt farthest to the left it would help slow down the cooking time on the butt. Thanks for all replies.