It's still in place. I was at the Greenbank Observatory a number of years ago. The population density in the area is very low and the mountains shield any VHF/UHF stuff from population centers.
I've been there - back in 1973! Spent almost a month at the "National Youth Science Camp" down in that area. Wonder if that program still exists.. Good to see the radio "silence" zone is still in place. I had wondered.
At night you can could the usual skip stuff coming in - used to listen to WABC from NY, NY back then. Those frequencies shouldn't interfere with what they're doing at the NRAO, which is way up there in frequency.