Two major Interstates, cross at Hagerstown. It is very accessable from all directions by road.
I-81 follows the Shenendoah valley North/South from Tennesee into Pennsylvania
I-70 travels East/West from Baltimore to Utah...
Hagerstown Regional Airport
There is regional aircraft service available with USAir, but only through Pittsburgh.
If your local destination is West of Baltimore/Washington, or you live in the area, check the airfares to/from Hagerstown. It may even be cheaper than flying from Baltimore or Washington. It`s a very convenient airport with free parking.