I think if the Vegas Convention was set in Spring & not in Fall that it would have been a better turn-out. Spring & Fall is pretty much the same weather but less windy since the Santa Ana Winds are at their strongest in the Fall Season. Then again I'd imagine renting the track out in the fall might have been a bit cheaper in price than in the spring.
Btw, cant wait for 2011, already got 2 piggie banks going for my trip.