Many of Washington's best museums and attractions offer sign-language interpreters and close-captioned presentations, among them the Smithsonian museums, National Archives, U.S. Holocaust Memorial, and many more. The Kellogg Conference Hotel is located on the grounds of Gallaudet University, the nation's only university with a visually accessible environment designed primarily for deaf and hard-of-hearing students. This might be a good pick for lodging and will give you access to lots of other great recommendations from local students and staff! More info at: http://www.kelloggconferencehotel.com/