I've never been to DC ever. On the east coast I've only been to West Palm Beach and some other nearby cities.
Enjoy your trip!
If you ever decide to visit DC, it is a lovely city, just don't come in the summer (from about June thru August) because it is very hot, temps getting to nearly 100degrees and it is very humid.
Sep. to About May would be better months to come, especially in March and April when the Cherry Blossums are out.