Flight
For those flying in, Dulles airport (IAD) is the closest and easiest for being picked up. Washington Reagan would be the next most convenient, as DC is not too far and there are metro options if you need to meet up with someone outside of DC. Baltimore (BWI) is normally cheapest - but also the furthest away. If you plan on flying into BWI, please make solid plans for being picked up or renting a car so that you are not left out there!
Hotel
For our out of town family and friends, we have a hotel block at the Residence Inn by Marriot in Manassas. Feel free to use either the reservation link or call and mention our names so they can help you book a room. Each room also has a sofa bed, so no matter what room type you book there should be plenty of sleeping space. Note: Check-in is on Friday afternoon, and Check-out is Sunday Afternoon.
Travel Note
There are three other hotels located close to the Marriot, so if you are looking for other options there is also a Quality Inn, a Hampton Inn, and a Comfort Suites nearby. We do NOT have hotel blocks at these hotels, but they are close enough to the Marriot that carpooling should still be easy.