For my In-Laws 50th Wedding Anniversary, they took the entire family on a cruise. With 11 family members in tow, we headed out of Seattle on the Holland America ship The Westerdam for a 7 day cruise.
Cruises are such a great way to do a large family vacation. There are so many different activities, which allows everyone to find something they like. Sometimes it might be your immediate family that send the day together. Then the next day it could be a Girls Spa Day, where all the ladies from each family go to the spa together. The best part, is getting together for the evening meal. Its a wonderful time for each person to share their adventures of the day with the entire family.