We will be there! I have been watching this cruise because my sister said she would come, but hasn't booked. The price has gone up a LOT.
My twin DDs will be 11 at the time of this cruise (they turn 11 in September on our 7 night cruise). So they will be in the same group of your DD, unless she will be 13 by then and go to the teen group.
It is going to be a VERY full cruise. I think there will be a lot of kids onboard (we have always gone in September before, so this will be a new experience for us).
Can't wait to see the holiday decorations!
DJ