Princeton is located midway between Newark airport in northern New Jersey, and the Philadelphia airport to the south. Drive times are approximately 1 hour.
The nearest train station is Princeton Junction, from which a small shuttle train (affectionately called "The dinky") will bring you into Princeton (walking distance to the Nassau Inn, although this is a good 10-15 minute walk). However, Amtrak does not stop at Princeton Junction as often as it stops at Trenton. A cab will get you to Princeton area hotels within about 15 minutes.
Just google your hotel for better driving directions than we could ever provide right here.
Shuttle buses will be arranged for selected hotels (to be arranged) each morning and evening.