Not sure about any "lighthouse", but I have fished J-Towne for years.
Want crappie? Fish the docks. They move. One year they will be one certain sets of docks big, and then next year they move. Not sure why, but it happens every year.
Are you talking about fishing from Shore? or boat? Not a lot of places from shore unless you get permission. A short section of bulkhead near the Rumsey Island Bridge is fishable from shore. All my fishing is done from boat.