We were there that time last year and I would call it "very crowded." Most popular rides were walk-on until about 11, decent until 12 and then obscene after that. We didn't want to be in the parks during most of the afternoon anyway because it was hot and humid, and we did fine because I forced my family up early and we were out of the parks mostly by noon. We waited at least 45 minutes for the tall slide at BB one afternoon (the name slips my mind).
I would rather go in the winter but am unwilling to give up snow skiing for WDW.
We're probably gonna go next year that time. Points are lower

. Althgough we may start homeschooling again in the 2006-7 year, in which case we would wait till September.