We are wondering the same thing. My husbands parents and his sister are coming along for our 7 day in March 2003. We have four kids 10,13,15,17. The grandparents are in the mid 70's and the aunt is in the mid 40's. The grandparents do not swim. I sure hope we can find things to do together at least some of the time. The kids are excited about castaway but the grandparents aren't sure if they will even get of the ship. I hope all works out and we all have a great time. Maybe I just worry to much.