Ok , I finished booking all the rooms so asked MS to start me on the process to get a grand gathering number. A problem came up because in one of the units they aren't sure if some of the group will be there the whole stay or only for a few days on the middle. The CM told me I can't get a grand gathering number until everyone knows exactly what days they will be ther and that once we get a number, no one can be added or dropped. So I guess the question is :Have you ever added or dropped people from your grand gathering after you got your number ? Thanks.