Ok, so I think 3.5-4 hours is a safe estimate.  I have a large cooler I use when smoking pork butts and I need them to rest.  We want to eat between 12:30-1:00.  I should start the WSM at 7:30, put the bird on at 8:00, and I should be done between 11:30-12:00.  People are coming over at 11:00...