We cook them up in 1/2 pans the day of the event, and slice to order. We have a Vulcan double oven on our trailer that accomodates 16-1/2 pans at a time. each pan has 12-15 portions. (depending who is slicing). We then hold in cambros.
Our prep and cook time is about 60-75 minutes. The whole process is a bit cumbersome, but it is a popular item and our cost is so minimal (3.00 a pan)
Hope this helps.
BOD, Operation BBQ Relief
Three Men and Baby Back, est. 2009