May 4 is opening day. You should easily be able to hit all rides during one day, granted they are all open. If you get there right as the gates open, you could easily hit all coasters in 1-2 hours w/out any hopping back on any coaster (its hard to do this on Knight Flight, the Midwest's only and the world's longest floorless coaster) because the ride is sooo sweet. 
 
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SAVE NAPSTER! 
napster sn- tontomono 
(I have been defeated)