We are talking aobut taking a long weekend trip to Boston later this summer. Obviously, the best place to stay would be right downtown by Faneuil Hall, but those places are pretty pricey. We plan to drive in, but then hopefully leave our car and walk or use public transportation to get around. So we're willing to be a bit farther out, as long as it's accessible. Cambridge? Up by the airport? Boston locals, help me out!