L.L.
How fun! I grew up in Vienna, one of the VA suburbs, and worked in the city 2 summers, mom worked there for many years. I always took the metro in. I think I've driven in the city once, at 6am on a Saturday for a special event. I would guess that for the money, staying in the burbs would be a better deal. I know Vienna used to be the last stop on the orange line, so I wouldn't stay any further out than that - probably a 30-40 minute ride in, if I remember correctly. As for the 4th, it is most definitely a mob scene, and specifically on the metro. Honestly, it might be worth either staying in the city that night, or staying out of the city that night - as in completely. Maybe find out where the fireworks are near your hotel and take a cab there or something. Though the national fireworks are pretty awesome. For stuff to see, please keep in mind that I haven't lived there since 1995, so I may be a bit out of date... Love the Natural History museum, Air and Space, Holocaust (takes many hours to do it right), Hirshorn Sculpture garden is probably cool enough even for teen-ish boys if you want to see art. and there's more, much more. We always ate lunch at the Old Post Office. It's walkable from the Mall and has a food court like a shopping mall. Has a cool tower you can take an elevator up - less line (and cost?) than the Washington Monument, but still good views. Cafeteria under the National Gallery is also very cool, don't know if you can get there w/o paying to go into the museum. Vietnam Vets is very powerful, as is the Lincoln. Take your boys under the Lincoln where the bathrooms are - if you walk to the back you can see under the thing. It's an enormous cavernous space. Way creepy in by book! I suppose that's it for now. Please feel free to message me if you're looking for more.