Best practice for using abbreviations (acronym or initialism) is to assume the point of view of an uninitiated reader and:
Never use the abbreviation in a title or heading
Always qualify the abbreviation at its first use in the body of the document
So the Original Poster (OP) should have made the title “Walt Disney World Abbreviations”, and in the body written “I’ve been to Walt Disney World (WDW) a lot over the years” …
Now I freely admit I don’t often adhere to that best practice unless I’m referencing something obscure like the now defunct DQ that was located in DD which is now DS. That’s tough to follow so lets try that again:
Now I freely admit I don’t often adhere to that best practice unless I’m referencing something obscure like the now defunct Disney Quest (DQ) that was located in Downtown Disney (DD) which is now Disney Springs (DS)
It’s difficult to know where to draw the line.