I agree with Dave. I think we can use Six Flags Ohio as a case study for this, actually.
Before I get started, let me just state that I'd never been to Geauga Lake before this year, and I've only been to SFO twice (opening day, and Friday the 19th).
Both days, there were relatively short lines for rides, and ***PACKED*** midways. SFO is a nice compact park. Almost TOO compact. If you looked at the crowds milling about, you'd have sworn you were there on the absolute busiest day of the year. But once you got in line for something, you were through before you knew it. I honestly would hate to see this place on a busy day, given how crowded the midways were... (Now, for all I know those WERE busy days for that park ;) )
Now, Cedar Point is a much bigger park. Lots more midway space. BUT they also have a lot more rides, AND some of those rides get BIG lines. Now imagine dumping those long lines back out onto the midways. What you get is congestion.
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--Greg
http://www.pobox.com/~gregleg/
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