I'm sure you could do it in one day, because I rode the Raptor, Magnum, Power Tower, and Mantis all three times. I rode Meanstreak, Gemini, and Corkscrew all once.If you add all of these up you get 15. That was all of the rides with the longest waits. This was in late August too.
Hey 1badgmc, which city are you staying at in Indiana, I'm asking because I live in NE Indiana.