Silas Conduct County Park, Kinnelon. Small body of water lots of bluegills in the cove area with plenty of room to cast. Pick nick tables and built in bbq's when you want to eat. Also, a nice short hiking path to takes the kids for a walk thru the woods. You can also rent row and paddle boats if you want to mess a round. It not that far from you.
http://www.morrisparks.net/aspparks/silasmain.asp