We had 11 on our last cruise (3 linked reservations) and when we received our Key to the World Cards, we saw that our group were at 2 different tables. So I went to check when we got on board, and I was told that the two tables were right next to each other and had the same servers. So the first night, we asked if the two tables could be pushed together and it was not a problem. Thereafter, each night, the two tables were already pushed together when we arrived at our scheduled restaurant.
Have a great time with your large group!