From New York:

(approximately 1-1/2 hours from NYC):
From the George Washington Bridge, Holland Tunnel or the Lincoln Tunnel, take the NJ Turnpike south to Exit 14 (Route 78 West). Follow Route 78 west to Exit 29, Route 287 South. Follow signs for Route 202 South towards Flemington. Drive about 14 miles on 202 to the Flemington Circle and take the second circle exit following Route 12 west. Travel through the next circle staying on Route 12 west and at the third circle follow Route 523 south. Follow Route 523 south, through the blinking light in historic Sergeantsville and continue to the bottom of the hill in Stockton, about 3 miles past Sergeantsville or 10 miles from the last Flemington Circle. Turn Left on Route 29 south.

From Philadelphia

(approximately 50 minutes):
Follow Route 95 North through Pennsylvania into New Jersey. Take the first exit in New Jersey, Route 29 North towards Lambertville, NJ. Drive along the Delaware River on Route 29 for 8 miles until you reach the antique-rich town of Lambertville. In Lambertville, the road becomes 4 lanes, stay in your left lane. At the light (Bridge Street) make a left, then an immediate right continuing on Route 29 North. Stockton is the next town, 3 miles north. At the main intersection in Stockton, at Bridge Street.