We have to sail when there are a lot of kids (my whole family are teachers) so it doesn't bother me. However, it will be crowded, but a lot of kids will be at the kids club. So I don't know what reservations you're hoping for, and how kids will affect those (like if you're hoping to go to the ice skating show during the day time hours, yes that will be harder to get reservations, but if you're late night people, it won't make as big of a difference). how aggravated do you get normally at the small number of kids?
Maybe for us, it isn't as big of a deal, because Mom puts on her "teacher voice" and I have a "teacher stare" and all of a sudden the kids scatter like roaches away from us! If we really need it, Dad puts on the "principal voice and stare" and whoosh there goes everyone, even the parents!