My notes:
Brisket on @ 11:48am, bottom vents all @ 50%
1:20pm - started another chimney and added several more chunks of apple & cherry wood. Didn't reassemble until 2:27 when bad smoke subsided.
4:51pm: flipped meat upside down, left on same grate.
6:30pm: top @ 146f, bottom @ 158f - switched top & bottom. Re-filled ring w/ unlit kbb.
7:27: reassembled cooker when flames & smoke subsided
9:47pm: both about 164f
10:40pm: 1 @ 164-175, the other @ 176-182f. Added 3 more chunks, refilled ring, this time with stubbs all natural hardwood briquettes, left cooker unassembled, placed both briskets on top rack.
11:17pm: reassembled cooker - drained fat from waterpan - must have been nearly a gallon of drippings in it.
11:36pm: Both @ 165f, cooker was @ 275, closed vents to 30% open, watched it until midnight, set alarm for 5:00am.
5:00am: both briskets between 198-202F, wrapped in paper, rested 3 hours & then vac bagged for wedding reception tomorrow @ 6:00pm