Bob Munro (Robin Williams), a successful California beverage company executive, is struggling with his dysfunctional family; with his materialistic wife Jamie (Cheryl Hines), his sharp-tongued teenage daughter Cassie (Joanna Levesque), and his twelve-year old son Carl (Josh Hutcherson), who is an adolescent weightlifter and likes hip hop. At a company picnic, Bob is embarrassed in front of his self-absorbed boss Todd Mallory (Will Arnett) by Cassie's militant friend Gretchen, who hurls a bottle of the company's drink all over Todd's face for putting unhealthy drinks in schools. Looking forward to a big family vacation in Hawaii, they are forced to cancel the trip when Todd, out of spite, tells Bob that he has to attend a meeting with the Alpine Soda company in Boulder, Colorado instead, or else he will be fired. Concealing the real reason for going there, Bob rents a garish RV from the dodgy dealer Irv (Barry Sonnenfeld) and tells his family they are traveling to the Rockies.
