Don - I've got to agree about the Smithsonian! Are you two going to get a motel and go in from there? I think that would a good idea if you set up someplace near the Metro. That way you can ride the Metro in and get off literally right in front of the Smithsonian. It's really nice you come up right on the Mall and when you're ready to go - just hop back on the Metro. You can find the routes in the local phonebooks if I remeber correctly (I lived in the DC area for a year). You can stay as far south as I think Alexandria, VA and still Metro in. Have fun kids!