coastergenius:
If you've been to PKI before i'd say skip it. PKI isn't really worth the eight hour round trip from northern Ohio and back if it will cost that much for the extra days. A couple of reasons; (1) I know there are a lot of bad things to say about the staff at SFO, but they are the same at PKI. All the lines are terrible if there is any sort of crowd, they don't push the lines, and the food service is painfully slow. (2) The parks atmosphere has really taken a turn for the worse since Paramount (3) It costs a lot more to go there, especially for you with a Six Flags pass in your pocket. (4) With the exception of the SoB, there hasn't been anything noteworthy that can't be found elsewhere on the east coast that has been installed.
But if you haven't been, The Beast is a great ride and the Racer, Top Gun, and maybe the Vortex are worth a trip. I don't know about the Son yet because i was unable to visit there for the first time in over a decade. Like i say to most people, while PKI is a park you shouldn't miss, i wouldn't go out of my way for it after i had been there once.
But in the end SFO has two good to great wodden coasters (Villain: the acclaimed CCI double out and back and Big Dipper: ACE coaster classic ove 75 years old by Miller)a floorless, an impulse , Flying Dutchman as well as some others to fill the time. All in all a park worth stopping by if you're in the neighborhood with a pass:)