Yeah, don't get lost in Newark.
I've flown into Newark.. its much easier to get out than JFK. (I assume you're renting a car?)
You're pretty close to the beach...
www.mapquest.com/maps/map.adp?country=US&address=&city=Fort+Monmouth&state=NJAsbury Park and Sandy Hook are two awesome places to visit.. I would defintely try to go there. I don't know if you're into drag racing, but, "English Town Raceway Park" (its near Freehold) is a nice place to check out the cars. They're having a event either this weekend.. or next, I don't remember.
Thats all that there is to do in that area, that I know of. The beach (if you decide to go there) shouldn't be that crowded, as its after labor day and most people have taken their vacations.
Are you in Army? What do you think of the DOD's decision to close down Ft. Monmouth?