I have held 1 full packer and 2 butts with towels in a cooler from about 2 am until noon, and they were great. The brisket might have been in there for a little to long, but not to cool off. It fell apart a little, but that just could of been the brisket. It was still very moist.
Oct 2011 Update. (it changes)
2 WSM's 1 of each (18.5, 22.5)
2 UDS's Gone, (Brother in Law took them....FARKER)
1 Rib Machine Chargriller Pro Hella Mod (Retired)
2 Bubba Keg (One HOT MOTHER, One LOW N SLOW)
1 22" Performer
Yoder YS-640 is the next cooking device.