I'm the family cruise editor here. I think what the others wrote is all very good advice. We were on Adventure of the Seas in June with our 8 year old and 7 month old baby. We were seated at a table with other older couples (no kids) and even though they said they didn't mind, I went to the matre d right away and asked for a table for four. The next night they were able to accommodate us at our own table for the rest of the cruise. I figured I'd feel less concerned if I knew that I wasn't bothering anyone else if the baby fussed.
Have you read my article on this section of Adventure of the Seas? You should! (I think the title is "A Family Adventure".) My daughter has been on 12 cruises and she deemed the Adventure's youth program the best!
Luisa Frey GAynor