A business meeting at Bob Munro's job forces him to cancel the family's much-anticipated trip to Hawaii, so he covers by renting an RV and taking them all on a vacation. Secretly, he is trying to get to Colorado for a business meeting. Along for the ride are his wife Jaime, and his kids Cassie and Carl, protesting all the way.
From then on, it's one mishap after another as Bob struggles to figure out the ins and outs of RVing. Ending up covered in fecal matter from an exploding sewage tank, he is rescued by the overcharming the Gornicke family, a down-home, full-time RVing family that the Munros will spend the rest of the movie trying to avoid.