We went on a June Saturday last year, we arrived at for the opening and were done with the park by 4:30pm including a lunch at Louie's Italian. (I used to work at the Louie's at Universal in FL, they have very good pizza here and the prices are pretty good, less then Disney.) We did all the rides and show plus the mummy and jurassic park twice, longest line was 20 minutes for the mummy. walked onto jurassic park twice without waiting, back to the future at the time was i believe a 20 minute wait as well. now with the simpsons opening up it will be interesting to see how packed the park will be. i am going on wednesday and will report back at how long the line is for that ride, i'm suspecting it will be pretty long, possibly an hour or so, but we will see.