My guess is the analog you're seeing referenced is not Limestone, rather Newport, VT. The issue was that the destination (festival) closed due to heavy rain-induced mud leaving nowhere to put any cars. With no destination for cars, they were left on the side of 91 (and adjacent roads), and tens of thousands walked 20+ miles to get in. I went to Limestone, too, and found that while there was traffic, nothing was overwhelmed like it was in Newport.
Hopefully general populace travelers are wise enough to bring paper maps, food, water and blankets in case the bottlenecks after get real bad.