Are airports and train stations available nearby?
If the workshop is in Chesapeake City, then Philadelphia International Airport is 55 minutes away; BWI (Baltimore-Washington) is 90 minutes. AMTRAK stops in Newark, DE (25 minutes) on weekdays (not weekends) and stops routinely in Wilmington, DE (40 minutes). (Enterprise Rent-a-Car has low rates in Wilmington.) The DC/Baltimore commuter train (MARC) to Perryville, MD is 30 minutes away and runs intermittently. Cab service is generally available from Perryville and Wilmington; you might arrange a lift from a fellow student for your return.