I'm sure the park wants most of the rides running for opening day. Though realistically, it's pretty unlikely seeing as generally there there rides not ready to open when the normally open in may. I'm guessing most rides test during the day at random intervals.
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder
Favorite Steel: Voltron Nevera, Steel Vengeance, Expedition GeForce, Olympia Looping
Parks visited: 232, Coasters Ridden: Steel: 894, Wood: 179, Total: 1073