I can help.
http://www.shadesofgreenvets.org/eligibility.htm
Scenario. You are the adult child of someone who was in the military. You want to stay at Shades of Green.
1) You can't make a reservation for yourself. Only people who have a tie to the military can. You can only qualify for a room if the military associated person makes a reservation for you and even then, they have to be there at the hotel too. As the others have said.....this is THEIR benefit, not yours. You only borrowed that benefit while you were a minor. The military cut you, the child, off when you turned 21, or 23 if you went to college fulltime. At that point, you stopped existing. They figure if you want the benefits to continue, you can join the military too

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2) You know someone who actually retired from the military, or was 100% medical discharge (which is considered same status as retired). They will all have a military ID to prove this. They can stay at Shades of Green any day of the year. They can get you a room too, but they must physically be present at the hotel when you arrive. This avoids abuse of the system.
3) You know someone who was in the military but did not retire. They do NOT have a military ID. This means they are in no way tied to the military. A few years ago Shades of Green changed the rules for people who served but did not retire. They MUST be honorably discharged and have the proper paperwork. They can only stay at Shades of Green during the months of September and January. They can reserve a room for you as well. Of course, that honorably discharged person would have to physically be at the hotel when you check in.
4) The spouse of the retired person wants to stay at Shades of Green without the "sponsor" (person who was actually in the military). That spouse also has a military ID and has full access to all benefits just as that retired military member does. The spouse is eligible to make the reservation and arrive at Shades of Green WITHOUT the sponsor. So, if your father retired, your mother would be able to go on vacation alone, or even bring a friend/family member. Her ID is her golden ticket.
Hope this helps.