Was there the 2nd week June 09 for 4 days. First 2 days the park was open to all AP holders. Last 2 days SoCal blocked out.
We were there the week right before the Nightastic kickoff.
First two days were pretty crowded. People everywhere and lines for everything. Evening fireworks jam packed.
The ride waits were something like this throughout the day.
Finding Nemo 60-120min
Pirates 30-45 min
Haunted Mansion 30-45 min
Peter Pan 45-60 min
Small World 30-45 min
Last two days crowds were noticeably lighter. Must more pleasant in the park. Though lots of people, I can deal with this.
Evenings still felt crowded but didn't felt like I was being herded like cattle.
The ride waits were something like this throughout the day.
Finding Nemo 30-60 min
Pirates 10-15 min
Haunted Mansion 10-15 min
Peter Pan 30-45 min
Small World 15-30 min
We were there in June 08 too and saw simliar crowd levels and pattern. The bad about early June is fewer shows and parades.
Plus no Fantasmic too. So after 2 annual visits in June, I definitely recommend waiting until mid June for full show schedules and go during AP block out dates.
You'll get more shows scheduled and lighter crowds too.