Dang, those are all so far east that I don't have any idea what to tell you, short of the usual "go Greyhound" that's already been said.

If Dear Friend is over 25, the car rental might be a good option. Or buy an old clunker? Could be cheaper than the alternative, though the overhead in time to re-register the thing might be prohibitive. Enterprise rent-a-car can be a decent source for longer-term rentals that don't have to be "fly in-fly out" of a single airport.