Man, I agree about the crowdedness. I went yesterday as well, hoping to hit all the houses with 15-20 min wait times...but it was more crowded than when I went on a Friday! 120min wait for Orfanage? No thanks. Off peak night? Whut?
I got there at around 6:15ish...traffic and parking was horrible. Didn't actually get into the park until around 8ish because of the long metal detector lines and ticket lines. I guess because it's cheaper on Sundays more people come? Also because it was a week before Halloween I suppose. I only got to hit 3 houses. 65 min wait for Psychoscarepy, which I was surprised, I thought it was great (not the wait time though, lol). I went through Legendary Truth for a 3rd time, with a 45 min wait, and Catacombs with a 30 min wait. It was pretty ridiculous.
I'm probably going back next Friday, because I still haven't gotten into Hades or Havoc.