Fans Having Fun

It seems one fans love of the original "National Lampoon's Family Vacation" sparked a 600+ mile trip to Wally World, or what's known to the rest of the world as Six Flags Magic Mountain.
You can read the full story of one fan's adventure at The Salt Lake Tribune

My first discovery was that nobody at Six Flags had a sense of humor.
I would make a John Candy joke and the guards did not even crack a grin. My first ride was The Whipper Snapper, but the workers who loaded us on didn't seem to have ever heard of Walleyworld or the Griswolds.

What's more, Magic Mountain opened in 1971 and became a Six Flags park in 1979. The only rides left from the movie are the Revolution (Whipper Snapper), Colossus, Gold Rusher and Scrambler.

There is also a NLFV Trivia information at the same location

In the original movie ending that test audiences hated, the family went to Roy Walley's home and held his family hostage. Actor John Candy, as the guard at the "closed" Walleyworld, was a last-minute addition. Notice that at Walleyworld, Anthony Michael Hall, who played Rusty, is taller than Beverly D'Angelo, who played long-suffering mother Ellen. Hall grew 3 inches after the original photography was completed and was now taller than his "mom" when the new ending was shot.