'Disney Nut' would not necessarily be limited to people who visited the Disney theme parks as children.
Before there was DisneyLand, before there was DisneyWorld, there were Disney cartoons and, most importantly, 'The Wonderfull World of Disney' on TV.
The TV show, introduced each time by Walt and TinkerBell, showed various Disney productions and, later, the plans for DisneyLand.
The TV show caused a Davy Crockett phenomenon in the 1950's, similar to the current Hannah Montana craze. Those shows, starring Fess Parker, featured 3 different episodes of Davy Crockett. Kids became hooked on Davy as a hero, particularly boys.
That was followed by Davy Crockett T-shirts, Davey Crockett toys, and even Davy Crockett bubble gum.
The Mike Fink keel boats came from the Davy Crockett episodes.
Training for being a 'Disney Nut' started long before the theme parks.
Fond memories.