I didn't say ask individuals anything --- but maybe when groups are having "their day" then let that be publicized. There could be more than one reason for wanting to avoid an amusement park when certain groups are going to be there --- one reason could be that it's going to be a very large group and you'd figure lines would be longer than usual.
It would be amusing to see the reaction to hearings to investigate a law requiring disclosure by such "open to the public" amusement parks.
Imagine Disney reps trying to explain why they do not want to tell the public that the "unofficial" event they give discounts, private receptions, permit to use the mickey ears logo, and block hotel room reservations is a private event they have no control over.
If you ask disney when the FL Bar meets there for anual anual meeting, they are overflowing with assistance to get you to the right place and time. That is not a Disney event, but they sure want you to know about it if you are a lawyer (or just ask).