My fiancee and I are looking for a ceremony site near Dulles for a fairly large group - about 230. We have the reception site booked and are really excited about it, but we were hoping to have the wedding off-site somewhere that felt special, but not too far away from the airport, ideally within 15 or 20 minutes. Although I would love outdoors, everyone else is concerned about weather (September), so any indoor space with natural light would be fine with me. Appreciate any ideas!