I don't have too many "traditions" to speak of, except for Kennywood. Traditions at this place center around food. Potato Patch fries with gravy and cheese. Elephant Ear. Funnel Cake. On the last visit of the year, buy a pound of fudge.
The only other "tradition" I have, is that on the first visit to a "new-to-me" park, I'll buy a magnet for the fridge, a shirt for my back, and a mug for my coffee.
That's about all that's coming to mind ;)
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--Greg
http://www.pobox.com/~gregleg/