I'm in Stephens City VA, and can hear plenty of LE traffic from SIRN on the Martinsburg and Mt. Weather sites.
Delete and re-import the entire system from the database, and don't avoid or delete anything in SIRN except the "Statewide Portable Site" and "WVRRT Portable Site". AVOID them, they are only used in emergencies where the normal sites are down. Enable Location Control in your Favorite List, and look up your GPS coordinates with Google Maps and enter them in Sentinel. Your scanner should scan the Kearneysville, Martinsburg, and Mt Weather sites, and you should hear plenty of LE traffic.