Jennifer -
FE work how you wish them to work. Yuo should plan on having something for each cabin participating. Now when I say something, that can be something for each person in the cabin or it can be a combination of both or you can just have one gift for the entire cabin. You can buy just for the kids in family cabins and something separate for the adults only cabins. Again up to you. You can have things for a one time delivery or you can deliver multiple days, again up to you.
We will have a total number of cabins and participants by September 15th as we are cutting the list of then, unless it is decided to extend the date. You can certainly start preparing now, I have as well as others.
Sometime after September 15th we will split the list up so that gifts are delivered everyday that we are on the ship except for Saturday and Friday. We don't want to have a day when there are no deliveries and disappoint the kids. I will also have printable version of the participants list up on the website a few days before we sail and I wil bring copies with us.
Hope that answers your questions