For hike in only, Island Pond is your best bet. An interesting hike through the Lemon Squeezer and skirts the Appalachian Trail with nice views.
http://www.nynjtc.org/hike/island-po...-squeezer-loop
BTW, the true hike in to the pond is 1.1 miles from the Elk Pen parking lot. You can make the round trip shorter/longer by taking different routes
http://www.hikeformentalhealth.org/2...active-people/