Being a State Park now, Ft Trumbull has gates that they close. There is a pier right on the same point where fishing boats dock to the north of the Fort, past where the USGA boats are docked. It always looked pretty tempting to me when we were bringing the fill in to that site. I also haven't been down there since we finished that job so they could have more gates and fences. I can't remember the name of the street but if you drove in to the gates to the park, just in case they are open
and turn left if they aren't...you are forced to go around the block. At the first intersection you come to go right. Keep going straight and the fishing docks are eventually on your right. You could then ask them if you could park and launch there. There was a nice slope with a little beach at most tide. Some rip rap to hold the bank but nothing you can't make your way over with a yak.