I agree. In addition the museum in Dayton, Ohio, is worth a visit.
https://www.nps.gov/daav/index.htm
Haven’t been there, but did visit USAF Museum @ Wright-Pat. Buckt list place.
The balloonists were attached to the Corps of Engineers, which was headquartered in Washington, DC. The very first Army flights were conducted at Ft. Myer, across the river from DC in Arlington, VA. Ft. Myer, however, was already hemmed in by urban development and was far too small to provide a safe test area. They looked for a better location and settled on College Park, at the time a trolley line suburb of DC and still rural enough to provide the necessary space.
This is how College Park, MD, became home to the Army's very first flight school, with Wilber Wright himself training the first pilots. It's also part of the reason why the College Park Airport is the oldest general aviation airport in the U.S. in continuous operation.
The museum is small but there is a lot of early aviation history there. If you are visiting DC and are tired your usual pilgrimage to the Black Lives Matter plaza downtown, check it out. You don't even need to drive; the Museum is just a couple of blocks from the College Park metro station.