Downtown Leesburg is about 12-15 mins from the venue area. You can park your car and walk around. There's places to eat, fun bars, and little shops. It's a cute area where you can spend the day! You can park anywhere in the town or in a parking garage.
DC is about 40-45 mins from the venue area. If you wanted to take the drive and spend the day there you can visit the US Capitol, White House, Lincoln Memorial and more, museums, and eat at some good restaurants! You can park anywhere in the city.