FP+ with large groups

[cici6198]

I am planning a trip for my entire family 13 people and 3 different groups for the beginning of December. I am the offical planner and I will be planning everything as one group is my parents and the other group is first timers. We have three different reservations. Is there a way to link these reservations to ensure that I can schedule everyones fastpass+ selections. I have planned numerous trips but never had to deal with this. Any help would be great!