Since I planned to not travel to False Bluff by way of the Caribbean once our canal was open, at my younger son's suggestion I bought a pontoon boat. A pontoon boat would be ideal for the bay, the lagoons, and the canal. And people and things go on and off a pontoon boat - not in and out, or up and down.
We assembled the boat at the edge of the water, propped up and leveled on scraps of wood we found lying around. When it was all put together we shoved the boat right into Bluefields Bay.