A family road trip is supposed to be a lot of fun . . . unless, of course, you’re the Heffleys.

The journey starts off full of promise, then quickly takes several wrong turns. Gas station bathrooms, crazed seagulls, a fender bender, and a runaway pig – not exactly Greg Heffley’s idea of a good time.

But even the worst road trip can turn into an  adventure-and this is one the Heffleys won’t soon forget.

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