We are leaving Sat. and will be in Washington for 2 days. Should we rely on the metro and our own navigating skills or take the trolley tour. Will we pay as much for the metro and the stress of having to get on or off that we would be better off doing the trolley tour? I think most things on the tour we want to see but I am not sure you can do it all in one day? Is it possible?? The great advice I have gotten so far has been very helpful in planning. Thanks so much!