Ok, so I have a 7LB Boston Butt and want to make pulled pork tomorrow. I have read and re-read many ways to smoke this. I figure it should take about 10-11 hours for it to be complete. I have the Masterbuilt smoker and plan to set the temp. to around 230-235. Should I wrap the meat in foil when the internal temp hits 140 and then take it up to 205, or just forget about the foil? Also, any recommendations for something good to put in the water tray? I also rubbed down the butt a little while ago with some mustard and Alton Brown's rub recipe.