rent a car
This is not an easy trip by Public transit
it would be quicker and cheaper to rent a car.
If y'all can fly into BWI, there is lightrail into Balto. The issue will then be getting from Hamburg St stop to the Greyhound station. It's several blocks and I don't know how to use transit to get to the Greyhound station. If you CAN change, perhaps some posters in the Balto forum will know
I'm going to suggest the auto rental
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