I am about to take a family trip to Maryland. We are going to stop at all the typical tourist spots and may venture into D.C.. I am wondering if going to the museums and scenic stops will provide a need for a wide angle lens. I use a 7D and my two wider lenses are a sigma 30mm f/1.4 and a Canon 24-70 f/2.8. I would most likely get the Canon 10-22 if there is a call. I have noticed that my 24-70 limits me sometimes and I am a little concerned about not being able to frame a large nearby subject.

Any thoughts are appreciated on the lens or good places to visit.

Thanks,

Brett