You will also be given some paperwork that indicates you are on a WISH trip. Make sure that you know what you are supposed to carry with you in case you need it. Nasty as this may sound, there are people out there who are making/using counterfeit MAW badges and GACs.
On a WDW trip a year ago, we were waiting to get into a show (I think it was Indiana Jones, but it could have been Tarzan Rocks). We were already standing behind a rope in the right before you go into the seating are, when a family came up with a MAW badge and told the CM they wanted to sit in the front row. That CM took them down to the front. While he was gone, a CM supervisor came. He asked the first CM if he had looked at their paperwork since the "child" looked well over 18 (the upper age for MAW). The supervisor said to always ask if there was any doubt because they had been getting some counterfeits. The first CM hadn't asked, so the supervisor went to ask. As we were waiting for the show to begin, we did see security come and escort those people out, so I think we saw a counterfeiter in action.