When in Margaritaville, dress as a Margaritavillager; i.e., anything summery like straw hats, shorts, sandals and colorful Hawaiian shirts. Grass skirts and coconut bras are preferred attire as well -- on women, and some men.
The proper parrothead plans sustenance around native dishes mentioned in Jimmy Buffett songs; cheeseburgers (in paradise), margaritas (for "wasting away in Margaritaville") and shrimp "they're beginning to boil -- bubble, bubble, bubble, bubble . . .")
Some ambitious parrotheads set up their own tiki bars in the parking lot, complete with a clock stopped at 5 (since it's always "5 o'clock somewhere.")
Then there are the traditional icons. Sharks (for "Fins") can be inflatable or stuffed toys, or represented by a large dorsal fin on your car roof.
Parrot hatwear and toy parrots are fashionable in Margaritaville. Why parrots? Onetime Coral Reefer Timothy B. Schmit (later with the Eagles) surveyed the Hawaiian shirted and otherwise colorfully clad crowd. Many of these fans follow Buffett around, a la the Grateful Dead. Coining a term, Schmit told his bandmates to scope out all the "parrotheads" For you cheeseburger heads, there are even cheeseburger hats.