Here is a suggestion on AAU tournaments - they are all run differently, and all have their quirks. You can argue until you are blue in the face, and you aren't going to change their minds. Just have the kids play, keep in mind that most of the refs aren't MOA refs, and have some fun. It goes by way to quickly.
Some are well run, and very well organized. There are others which are purely money-grabs by the "organizers".
Rule of thumb - if the sponsoring organization is a "Club" and not a team or a specific, well-known organization, it is probably done for the cash and not the kids.