The title is a reference to a "Mobile Home" or an RV.
In the Spanish (from Spain) dubbed version, when Lisa reads Homer's Flintstones map, she says, "Dino, abreviatura de dinosaurio; consultarlo en la Wikipedia" (Dino, abbreviation of Dinosaur; search for it in Wikipedia). In the original English, she said "Dino, short for Dinosaur? Remember to Ask Jeeves."
Among the vacation disasters: Homer impaled by a baguette in France, Homer getting assaulted by Mickey Mouse and Goofy at the Magic Kingdom, and Homer stuck in Lincoln's nose on Mount Rushmore.