You can actually get the complete listing of perks by calling Member Services. I spoke to them right after the announcement of DL deals (via the newsletter...a couple weeks ago maybe?), and the rep was shocked that it couldn't be accessed from the website. Nevertheless, she read to me the complete list of participating locations of discounts, as well as the $20 off of AP. Unfortunately, the list was loooooong and I don't have it with me now, but I'm sure you could give them a call and ask about specifics if you'd like.
FYI, we're going during 50th Celebration week too, and I'd been hoping for other perks...namely some sort of discount on regular Park Hoppers, since the affordable AP is blocked out for much of our stay and the other is just not cost effective for us, even with the $20 discount.