There are plenty of hotels, Air BNBs, and VRBOs in the area. We recommend looking in Frederick, MD or Gettysburg, PA. We are in the process of coming up with a list of recommendations for hotels in the area.
BWI, Reagan, and Dulles are all within an hour driving distance of Frederick, MD depending on traffic.
The wedding is located in a part of town that is most accessible by driving. We recommend renting a car or carpooling. You may have some luck with ride shares though they will probably be expensive due to the distance.
We plan on coordinating carpool's back to the Hilton Garden hotel. Around Frederick, it is pretty easy to find ride shares to the venue and we highly encourage sharing with other guests! If you need a carpool group, text Kate or Richard and we can connect you with others.