I have a place in Great Cacapon WV and just today discovered the Town Creek Aquaduct area.  I was not out at "prime time" but did see many Blue-Gray Gnatcatchers, heard a Yellow Warbler, a Parula, and 1 Common Raven. along with the usuals.  I imagine I might see about the same things described at the North Branch as where I was today. 

Janet Ardam
Gaithersburg and Great Cacapon