How coincidental - for our trip to Busch Gradens a couple weeks ago, I made a road tape themed to the Duff Gardens episode - putting clips from the show between the songs. Based on Homer's saying "Duff Gardens - Hoo-rah!!" and then passing out on his steering wheel I called the tape "Busch Gardens - Hoo-rah!!" (I'm quite proud of the photo I used for the cassette case - a bloody Fabio on Apollo's Chariot). Anyhoo, based on my now extensive knowledge of that episode, I can tell you Duff Gardens had the "Whiplash", an unfinished woodie, along with the Barrel Roll; the only of the Seven Duffs that were named were Tipsy, Queasy, Surly and Remorseful.
On a related note, one of my favorite Simpsons is Itchy and Scratchy Land ("The Violentest Place on Earth") - one of the "Lands" in the park is "Unnecessary Surgery Land". That is also packed with swipes at Walt Disney, his politics and policies, some pretty vicious (like the lines "He - Ralph Meyers Sr., the Walt Disney-like creator - loved almost all the children of the world" and once made a film called "Nazi Superman are Our Superiors"). Just one of several occassions on which the Simpsons link Disney and Hitler.