We're the Millers (2013)

Small-time pot dealer David (Jason Sudeikis) learns the hard way that no good deed goes unpunished; trying to help some teens, he is jumped by thugs and loses his cash and stash. Now, David's in big debt to his supplier and -- to wipe the slate clean -- he must go to Mexico to pick up the guy's latest shipment. To accomplish his mission, Dave devises a foolproof plan: He packs a fake family into a huge RV and heads south of the border for a wild weekend that is sure to end with a bang.