I attended the Mason Dixon Star Party a number of times when it was at the Spring Valley County Park, then at Codorus State Park (which was not a very good location due to light pollution from Hanover), and finally at the Shreveport Airport/Footlight Ranch near Wellsville. The final location was a rather short drive from where I live and was just 11 miles to the southwest of the Naylor Observatory.
Dave,
I also attended the very first MDSP in 1990 into the time it was held at the Shreveport site. I liked Spring Valley the best due to the setting, but admittedly, the development at the Shrewsbury exit on I-83 rather destroyed their southern horizon. The Shreveport site was reasonably dark for the area, and I enjoyed it too.
John