irnoically, it doesn't appear to be carried by Abc stores
It is sometimes, I've found it in Reston (South Lakes) before.
They give a nice little half-hour tour if you go to the distillery, and you can buy it there slightly discounted. Unfortunately, you can't actually taste it there, under Virginia's oh so intelligent liquor laws.

Unless you go down during the week when nobody's around, and the proprietor likes you, and you become his "guest", and step out behind the back barn and he might then offer you a tasting.

They also have a rye, even more expensive (and pretty good in its own right) but I recommend the Single Malt. Note this has little resemblence to the refined and smooth taste of scotch. It is aged only 16 months, but gets a ton of flavor from first the smoking process (wood chips in a wood stove with the malted barley suspended overhead above a perforated tin floor), then the aging where they put apple and cherry chips in the barrels. It's not "smooth", but not harsh either and it is packed with a swirling melange of flavors. I really love this whiskey. Bold, proud, loud, a bit coarse, American.