Our park opens in mid-late March. Come in the first 2 months if you can. The park opens on weekdays once school is out which is late May/early June. Sundays are perfect before school gets out, especially if you can be at the entrance gate right before the park opens (and not just getting to the parking lot.) Go straight to the back of the park first (everyone hits the rides at the front first.) Hit Superman, GASM, Ninja and SkyScreamer back there (should not have any lines at all first thing in the morning.) If you are a credit whore, hit the kiddie coaster on the way to the mine train, then head to Acrophobia and GA Cyclone. Continue around to GA Scorcher, DDD, Batman, Mindbender and leave Goliath for last. That usually works and gets most people to the back of the park as you are heading back to the front. Superman, DDD and Acrophobia get the longest lines in the park.