I've heard of the "seven day rule," too. Apparantly, the dinner package can only be booked through August, and after that it can only be booked seven days in advance. But I've also heard that they keep extending the "advance PS" period month by month (it was originally supposed to end in March). Maybe by September they'll be letting us book for our October trips.
Best bet is to just stay tuned to this and other message boards for the latest info on the extension of advance PS possibilities. (I've been following this one myself as I'm going in October and would like to make a PS for HandV fantasmic package).
Good luck, and let us know if you get any new information!
