Ultimate Eastern America Trip!

Hey everyone, I'm planning what is going to be the ultimate coaster trip of the eastern US.. So far, we're planning to hit..

SFGAdv
Hershey
Dorney Park
SFNE
Kennywood
Cedar Point
Waldameer

Is there anywhere I'm missing in the general area of these places? We'll only be going to places within a 4 hour drive of one of the other parks though, so we can't go to BGE or anything like that. Thanks!