For theme parks, yes Florida is the place to be, but, as stated before, the amusement park "pit" is truely located from Ohio eastward.
I mean, yes, it does span a heck of a distance, nearly 17-19 hours driving time wise, but starting at CP and winding up at SFNE, you'll pick up some awesome parks, including GL, Kennywood, Hershey, Dorney, SFGAdv, SFDL, and SFNE. Its a pretty great cluster of parks, as compared to anywhere else, where it is at most 3-4 parks with not too many coasters going on.