8A family road trip is supposed to be a lot of fun . . . unless, of course, you re theHeffleys.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 Heffleyswon t soon forget."