Don't miss Baltimore's Inner Harbor. Photo opps abound there and a harbor cruise is nice, too. Good shots from the boat approaching the harbor
on the return trip. Delaware is very nice and plenty of photo opps. The ocean and bay areas are close to one another (about 1 1/2 - 2 miles apart) This is the Rehoboth Beach, Dewey Beach and Bethanny Beach areas. All just a few minutes apart down Rte 1 (Coastal Hwy). There's also historic Lewes, DE. Very quaint and Cape Henlopen which is an historical beach with war time watch towers, etc.
Hope this helps.

Have fun, Personally we couldn't wait to move out to the west coast from DC. However, it will be very different and you may enjoy the east coast more. Who knows? Be aware of the humidity as well. Vermont is very cool, we have visited the state several times over the years. I wasn't into photography when we lived in NoVa, so I couldn't recommend many places. When we moved out to Oregon, we wanted to see the country and took a month to drive across. We skipped everything until we were in Western Nebraska - but we did purchase books for Dakota, Wyoming, Montana, Idaho and of course Oregon. Helped us a lot to find things we were interested seeing.

I would also highly recommend http://roadtrippers.com/?lat=40.80972&lng=-96.67528&z=5

I hope I didn't sound too negative. Enjoy!!!

With so many locations, it's just not possible to list all the places for photo locations. You could spend the entire 3 months in NY City and not exhaust the possiblites. An idea. When in a given location, why not ask where the best photo locations are, in that area. Example- no point in going to Vermont any other time but october, so as to shoot the best fall leaf colors in the east. But you don't want to be in Northern New England in November unles you like cold weather. So, when you get to a place, give us a shout and ask.

On your way to NYC take a detour to Liberty State Park. You will have access to the Statue of Liberty and Ellis Island as well as a newly restored train station that was the access point for everyone entering the US at a point in time. Also, incredible views of lower Manhattan including the new World Trade Center.

If you are getting to Baltimore you just have to go an hour south to see DC. Outside of the iconic views of monuments take in views from Rock Creek Park... Zoo and flora.

Philadelphia- go the East or West River Drive along the Schuykill River to photo the Ivy League rowing crews practice and race. The falls right by the Philadelphia Art Museum is a huge photo op.

Going North do not miss Martha's Vineyard, MA and the infamous Chappaquidick. On the Vineyard rent a scooter or jeep and head to Menemsha for sunset, Gay Head for cliff views. Take the three/four car Chappy ferry over to Chappaquidick for the nature preserve. The entire island is a photo career in itself.

I could go on as you are Travelling the part of the country where I have lived most of my life. Have a good and safe trip.