Well I haven't been to Disneyland that much since the summer crowds have arrived but for you regulars when is the least crowded time during the summer to visit Disneyland? Middle of the week, at night, early in the morning?
I went once in June and took a day off from work on a Wednesday and found it packed all day. It was pretty Miserable.
Then 2 weeks ago I went on a Monday after work (6 PM) and stayed till it closed and I felt like my wife and I had the park to ourselves. Our longest wait was 30 minutes and that was Indy. Everything else was less than 10 minutes.
I guess you just have to get lucky!
Check out My Roller Coaster Tycoon 3 rides... I'm always working on another one... I hope they make you want to go to Disneyland.
I think it depends right now. I once went on a Wednesday, and it wasn't crowded at all. We went there this past Sunday, and it was pretty dead. The longest we waited was - I think- 15 minutes, and that was for BTMRR. I think it depends nowadays, because you never know when it will be crowded.