There are two ways to get to Bluefields, by plane or by boat. There aren't many planes but there are a lot of boats. As the old saying goes, the two best days when you own a boat is the day you buy it and the day you sell it. Luckily getting back and forth from BLU to False Bluff doesn't require a huge boat or the problems that come with them.
The below boat used to be a catamaran. Seems that Cayman Rocca isn't the only sea mount along the bluff.