We are going in April with a group of 7 total (4 adults & 3 kids).
Everyone in our group "voted" & put me in charge of PS. Ok there was no real "vote", but everyone said "Lynn you know the most about Disney so you do it!"...LOL!
What I did was have everyone pick one or two resturants they really wanted to do. If there were more then one vote for a place, I deffinetly made a PS there.
Otherwise I just did my best to accomdate everyone's wants. But if I could not find a place to fit a certian resturant, we did not do it.
I made my PS's at the 90 day mark. After I finished them I sent everyone am email with what I had done. I told them all to "speak now or deal with what I have done".
I only made once change & that was because the other family decided they did want to do the Fantasmic Package with my family.
If there are so many people going, I think it is best to do what we did. Put someone in charge & you run with it. If anyone else wants to complain later, well you gave them their chance & they didn't say anything.
It is much easier to subtact people from a PS then it is to add. So make those PS's now & if people change their mind, call & change your party to a smaller size.
But as one of the pps said, change them as soon as you know. Because if you have a PS for a party of more the 8, you will get an automatic gratuity on your bill.