But those three courses, and many others, were purpose built to not be in the way of sprawl. Just look to where I am right now in Raleigh, NC. First Raleigh CC and Carolina CC were "outside of town" when they were built. Then it went out to North Ridge CC, then to Wakefield and now all the way to Hasentree which is a full 40 minutes or more from Raleigh center. The same happens with all major cities. I think its safe to say that NGLA and Shinnecock were not nearly as "close" to the city when they were built as they are today. And again, that was the purpose of Sand Hills, et al. To be far away from anything; they won't stay that way forever, but it will be many, many years before any significant population center is seen around any of those courses.
But as a secondary consideration, weren't all the "best" courses (in America anyway) originally designed to be a decent ways away from the population centers? Were the great courses like Pine Valley, NGLA, CPC and others like that very close in to the city when they were built? So in many ways, the modern great courses follow the same model. They are built semi-far away from the population centers, however, today its a lot farther because there are more cities and travel is much easier. Discuss??