Yes, it's often an issue of "not in my backyard." Look at all of the large parks and where some have been built. Places like Cedar Point, Disney World, BGW and others tend to cover a lot of ground but are otherwise fairly isolated.
There's also the consideration of infrastructure (highways, accomodations, utilities, etc.) that can make or break a project. Some locations are just better equipped to handle a park.
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Jeff
Webmaster/Admin - CoasterBuzz.com