Hi Nancy- thanks for your input!
I am making all of the groups, and linking all of the tickets, so I know it will be done correctly!!!
Fortunately, we won't be making the FP reservation for all 150 people for the same times. We will have 13 groups of between 5 and 21 people and the FP will be made for each of those groups independently. Plus, two of the days the girls will be in different parks from the boys, so it will just be half of the group trying for FP for the same attractions. My group is 12 boys and 5 chaperones and that will be the first group attempting to book FP!!!
I am on ticket-watch, hoping they arrive this week!!!
PS- thanks for your thorough and honest review of your stay- I'll address that when I catch up on the thread.