I know the CM has to check you in.... I met a very nice CM checking in her cousin while waiting in line at All Stars several years ago. She was not staying there, but did have to be present to get the person in thier room.
Also, I got the impression from talking with her that you can't book months in advance. She had gotten this room fairly late and her cousin had a full price room as a back up until the CM discount came through. (I did not ask what the rate was)