I guess it depends on what time they are doing Wishes that night, but the good news is that if you leave before they do it you can return with your restaurant receipt and go out on the catwalk for the show.
Not all tables have a great view and so it's better to go out there anyway. Personally, I like to eat late and plan it so that we're having a drink and waiting for our table while Wishes is going on and then eat.