I am taking a trip to Washington DC and want to get a carry on bag that I will also carry while touring. I would really like to replace my current edc swissgear backback for my 13" rMBP with the brain bag, but my wife is concerned about museums and such not allowing me to carry that bag in. She suggested the co-pilot instead, although I am also looking at the pilot. Since we will be doing a lot of walking, I like the idea of a backpack. I plan to carry a dslr and a couple lenses. Does anyone have the experience with DC to offer guidance?