Check out the Northern Neck Visitor's Guide at
Welcome to Virginia Real Estate Reviews, Inc.. You should be able to find a paper copy at a convenience store or realtor's office once you're in NNK territory. Northern Neck is a large territory, and if you have a preference to stay close to NOVA, you might want to start your search in the King George, Westmoreland county areas.
I lived in the Ophelia area of Northumberland County for 6 years -- about 50 minutes drive from Tappahannock -- but I preferred being close to the Chesapeake Bay vs. more inland on a creek/river. Most of our neighbors were from NOVA and MD. Reedville, Kilmarnock, Irvington and White Stone were quaint towns closer to me than Tappahannock.
Enjoy your visit!