Great Sage is normally the place I'd suggest but looks like it might be 20 miles out of your way. Your best bet may to be to go into Baltimore itself.
Here are a list of veg friendly restaurants in Baltimore. You might want to call to verify that they are open before you go though because I swore some on those list are closed (Land of Kush? Emily's Cafe?). I've been to One World Cafe and Liquid Earth. I thought One World Cafe was slightly better. They had vegan desserts too.http://www.vegguide.org/region/311
There are also some peeps that go to school in Baltimore so maybe they'll see this and pipe up as well.