Virginia is pretty straightforward. Just about anything goes in terms of packaged sales, can buy beer and wine at any licensed retailer, the hard stuff only via state stores, no Sunday restrictions (unless there's dry jurisdictions I'm not aware of). If only small breweries were allowed limited self-distribution as some states have (best I've seen is tiered barrel per year limits directly related to radius of self-distribution, but no luck here).
Maryland is weird because every county handles it themselves. PG county seems to be a craft beer wasteland for the most part, but there are drive thru places. Montgomery County is actually fairly cheap to buy alcohol, good for liquor, but the county does all the distributorship so the beer is always stale and selection sucks. But the best bottle shop I've ever been to (State Line Liquors) is in way northern Maryland, literally the last exit on 95 before you cross into Delaware.
DC, Free For All doesn't even begin to cover it. Grey market sale is legal. The way it works, anything not currently imported into DC by a licensed distributor can be self-imported by any licensed retailer. So DC beer bars will have Heady Topper, Pliny the Elder, Hill Farmstead, and so on. Now, they're not always common and almost always at MASSIVE markup, but they're there. Hell, at Zwanze Day last weekend, I bought a bottle of Westvleteren 12. I understand how US-brewed beer flies in DC, but I didn't think that'd work with imported stuff, so I have no idea. But it's there.