I think that you should first head to Flight of Fear, as that normally has its longest lines in the afternoon, and generally has a line by the time you are done with the Action Zone. Also, everyone who is at the park (most people anyway) head to the action zone first. I recommend, after Flight of Fear, heading to 7th Portal, followed by the Vortex, Beast, Nick Central area and then make your way back towards the Racer and back into the Action Zone. Generally Son of Beast has its shortest lines in late afternoon, early evening. Even Jeffrey Siebert recomends that coaster enthusiasts stay away from the Action Zone first thing.
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www.geocities.com/coastersrz I`ve riden Son of Beast 44 times!