FastPass 60 Day Window

[rekrab1]

...is coming fast! We have used the new fastpass before. This is the first time we will be traveling with others. I have booked and payed for all three rooms. They all show under My Experience but the other rooms have other adults as lead guests. One of these guests has an account however the other room's adult will not have an account. When the time comes to book fast passes will I be able to book them for all 13 guests under these three reservations or will each lead adult need to book guests in their own room? Any other info that might be helpful would be appreciated.