you can though get an approximation about things (barring special events and such do not change dramatically) for a year out by looking at the previous year's stuff...like right now, you can see the first half of september - to view second half or october and on, you would have to look at 2006, but it still helps...you can get most of your planning that way, and just slightly modify and firm things up when the crowd charts come out six months out.
It really helps because, I almost have everything figured out, and when the second half of september comes out, I will be ready to compare what I have with what he said...and if there are changes...and I will (hopefully) be ready to make my ADRs on at 180 days before I leave (which is coming up on SUNDAY!)
Hope that helps!