I arranged with Magic Kingdom last year for my husband to participate in the Flag Retreat. It was not easy to do but it can be done. Here are the requirements and how I set it up:
1. First and foremost, you have to be currently serving in the military or be a military veteran in order to participate. If you have never served in the Armed Forces, they will not let that person participate.
2. Next, I called WDW main # and asked for the Magic Kingdom customer relations desk. Once connected I told them that I wanted my husband to do the Flag Retreat and asked who could help me. They told me only the front gate manager could approve that and add my husband's name on the calendar. They had me leave a voice message for the front gate manager at the MK.
3. He called me back after leaving numerous messages (very frustrating) but he did call back, told him what I was asking for, and he put my husbands name on the list.
After the ceremony, they presented by husband with a special Flag retreat certificate and a special military Mickey pin with the Flag retreat logo on it.