I'm from Boston and I spent last Thursday and Friday at Cedar Point with no lines. 1/2 hour for Mil Force 4 times! Then Saturday we went to Six Flags. Crowded as it gets!(Cleveland Clinic) We got on Superman right away, pretty good. Then we were in line for Batman Knight Flight and it broke down, then it ran later with one car. The Villain opened late in the day but by then we said forget it. 3 rides total. I was more disappointed with the park than the crowds though, just like Six Flags NE here they have retrofitted the park with new crowd building rides that they aren't prepared to service, and other than the Looney Tunes land the rest of the park is a dump!
I guess thats what I get for bad planning! The real question is why Six Flags would hold a company outing mid-season. Such events are usually held pre and post season. Well, at least I got to ride Superman.