Oh, oh, can I join this group?

I'm doing a happy dance because we're finally booked! Going with DH and our two guys who'll be 11 and 9 at the time of the cruise.
Does any one know - my younger one will be 2 months shy of his bday and would really like to hang with older brother in the Lab (they hung together alot on our last DC in Dec., but they were both in the 8 -10 year old group) - will the counselor's allow him to go with the older group since he will be so close to 10? I've read that they will allow without problem when you're within a month of birthday - but he'll be another month shy of that. Okay - hopefully that made sense.
Hello to everyone!