Catherine Keller provided information for the Port Authority/NYC bus from Coach USA that goes to Morristown. The schedule is linked below. It stops at the Westin Governor Morris, which is not walking distance but is certainly close enough that someone on campus could easily provide a ride.
http://www.coachusa.com/community/ss...d=344856551473
You should also reach out to Sarah Abramowitz to get on a list she is organizing of people who need to get in from Manhattan.
Best,
Tina