Thursday's are usually pretty quiet. The water park is usually mobbed every day, you'll usually have your longest waits of the day there. The Tornado and Brain Drain usually have the longest lines, Brain Drain can have an hour wait at times, usually it's the longest line I wait in all day. In addition, the water rides in the park like Grizzly Run and Thunder Rapids usally have decent line ups all day. As for the dry park you shouldn't wait more than two cycles on pretty much all of the rides aside from ROS which can be anywhere from like 2 to 5 cycles depending on when you hit it. But even with that I don't see you waiting more than 15-20min for any dry ride. Hoped that helped. Have fun!