This year I was able to make all my reservations in June for Aug at 6a eastern, so 3a pacific. Like the PP said for most you can wait as the first day I had to wait until 10a eastern and had no issues getting what I wanted at the time I wanted and the site showed plenty of time available. I think I had to wait a little longer for the WOC dining package at Wine Country for lunch, I kept checking back until it opened up. I just can't remember if it was a few days or a up to a couple weeks