The put in / take out is a little cove on the river behind the new Cooper House Restaurant (formerly the Lobster Trap).
Park in the Cooper River Park Parking lot between the Cooper House and the William G. Rohrer Children's Playground (to the West - to the right facing the Cooper House). From parking lot take path by Veteran's sign past the West side of the Cooper House towards the river.
Google map to the Cooper House:
5300 North Park Drive, Pennsauken Township, NJ 08109
There are restrooms/port-a-potties West of the playground which is West of the Cooper House.