I just talked to some Il. river boys who were at the Pool 18 drawing, as well as Rice. They all said both were run the same. All names drawn first, then those drawn select their blinds. I know it has been that way at every blind drawing I've been to for the last 30+ years on the Miss and it was that way when I went to several of the Illinois river sites back in the 70's and early 80's.
IMHO, it is more efficient. By the time they've drawn 3/4 of the names, the crowd starts to thin. This allows those drawn to have a bit more time to refine their picks and work towards the front to pick their blind and pick up the packet.
I do recall going to one drawing, somewhere, where they did try to select the blinds immediately as the names were called. The guys not associated with the winner were yelling out the numbers of the worst blind on the area, wrong blind numbers were being marked off the board, the winner had to almost punch his way close enough to be heard....in other words, it was a cluster.
Semper Fi, Marines
Casey 1997-2011 RIP