Well, my family of FIVE are booked on the Triumph with two other couples who also have families of FIVE, each family has a cabin that accommodates FIVE. Call Carnival directly, or you can go to EBAY travel and book the exact room you want from their website, provided there are still cabins left on the ship that will accommodate 5. We are traveling over the February vacation week, so we booked way ahead of time and had no problem at all getting our cabins fairly close together.
Our thought was we don't plan on being in our cabin other than to sleep so we aren't worried about space. The kids are old enough to get up and get themselves going, and hubby and I can just hang out in bed until they are up and out.