The cast of Jersey Shore: Family Vacation is ready to say goodbye to MTV with one final Sunday dinner. In Us’ exclusive sneak peek of the Thursday, September 3, finale of the reality show, the entire cast travels back to where it all began at the Shore House for one last feast. “For the first time, we don’t know when the next family vacation is,” DJ Pauly D says in the sneak peek. “Before we all leave, let’s go back to where it all started.” A montage of clips from the past 17 years plays as Nicole “Snooki” Polizzi, Mike “The Situation” Sorrentino, Jenni “JWoww” Farley, Vi...