There is a creek on the north end that you can put your bass buster in that will get you in the lake, been there done that before.
i believe the road CR 2550 leading to the creek has been blocked by mining operations. I used to launch there in the early 90's when i fished out of a buster boat. A friend tried it laast year and could not get there.
if your buster boat has a gas motor, (mine had a 6hp motor) it will take a half hour but that was by myself.
you might try knocking on the doors of the two houses near the railroad bridge, there is a creek that runs behind there property.