Having a group of people over for the 4th and I'm smoking 2 pork shoulders. They total 14+ lbs, so about 7 lbs a piece. This may be a stupid question and I think I know the answer, but should I plan on the smoking time being the same as smoking one 7 lbs shoulder or based on the total 14 lbs? I'm thinking 7-11 hours, not 14-21 hours. Right?