Continuity mistake: While traveling out to the reunion, the navigation voice said "now entering Arizona", while at the same time the navigation screen showed them leaving Arizona and entering New Mexico.
Continuity mistake: Near the end of the movie in the scene where the Johnson family go to the auto shop Destiny says, "Look, there's our door." Her lips don't move.
Continuity mistake: When the family leaves Uncle Earl's shop with the fixed SUV, near the end of the movie, the rear view mirror is missing from the windshield. When they pull into their driveway in the next scene it is there again.
Continuity mistake: On the way home from the reunion, when the kids are all sleeping in the back of the car, Destiny is in her car seat, but all of a sudden the seat is empty.