You're not going to find any "great" places around FFX. Too much light pollution, so most parks in the area will be about the same for viewing. I'd suggest trying to find a place out toward the Shenandoahs. I have friends out there, and their property gets super dark to the point where you can start to see the Milky Way's haze with your bare eyes.
Here's a light pollution map of VA. You'll notice FFX is entirely white or red (the highest amount of light pollution). Where my friends live, it's in a green or yellow area. So ff you can find a location that lies within a green/yellow area of the map, it should be a great place for amateur astronomy.
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