Tom Baker (Steve Martin) and wife Kate (Bonnie Hunt), hoping to bring their family together for a memorable summer vacation, take their 12 offspring to the rustic Lake Winnetka. But their retreat soon becomes cutthroat when they enter into a competition with the over-achieving members of a large family headed by Tom's long-time rival, Jimmy Muraugh (Eugene Levy).

  Canadian Connection: Several cast members are Canadian; almost entirely filmed on location in Ontario, including Toronto, Burleigh Falls, Aurora and Guelph.