I’m reading your linked page and I don’t see where it says they are prohibited. It even seems to suggest there may even be designated areas where they are expressly allowed.
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Maybe not in the actual park per se but this would seem to indicate you can have them in the hotel. Now I know Animal Kingdom is massive but it would seem to me if you could find a place to take off from off the property there’s nothing that says you couldn’t fly over.
I haven’t been in a long time so maybe this isn’t realistic