In the late 80's I saw John Black from Days of Our Lives. He was on the Teacups the same time as we were. I didn't notice him until I saw several middle aged women along the rail squealing and taking pictures of someone near us.
In Dec. '02 we saw John Stamos at the winery @ DCA w/ a child in a stroller (niece?).
Our most recent trip (Dec '08) we saw Laura Dern w/ her child.