Only place I have camped within 3 hours of DC (unless you count the Walmart nearest the Philly airport?) is right on the Shanandoah River near Front Royal. Those were the first two night in our camper after flying to CT to buy it, picking up my wife at the Philly airport, then driving back to denver almost exactly 6 years ago. We really enjoyed camping in a paid Rv park right next to the River with hardly anyone around in January. We joked we woke up in a John Denver song. The park was nearly empty and I remember being blown away by.....Stonewall Jackson's (?) route being chased back and forth over those mountains......
Beautiful area, tons of history, and less than 3 hours from DC (maybe)
2006 LanceMax 1191 - loaded and well-used
2005 C4500/Kodiak 4x4, GVWR 17,500