I picked up my 18.5 WSM on Thursday after work. Assembly today and first smoke tomorrow for the family with 3 whole chickens beer butt style. On my old MES a whole chicken would take about 3 1/2 hours at around 250. With this being my first smoke on the WSM am I looking at about 4-5 hours from the time I light the coals? Planning on using water to help control the temps for my first few cooks and using the minion method. Any suggestions would appreciated!