I've been going annually for the past 6 years and always waiting impatiently for next year's rates. IIRC room rates have been coming out mid June. Packages may come out at the same time or later - I remember one year packages weren't out until well after the rooms.
I can also tell you that discounts for Jan/Feb usually come out the first week of October (although that can vary a bit, too). I've been in early Feb 4 of the last 6 years and am looking at Feb 3-10 for next year. I like it.