Your hotel or property manager will probaby assist with arrangements, but if you are the more self-sufficient type ...........
There are two private water-taxi men who are clean and sober 24-7.
Armando Gonzalez and David Rancheron.
I would (and do) trust my life to either of them when it comes to sensible boat handling and thorough knowledge of local waters.
They drive their own boats (read between the lines on the importance of that item).
Both carry cel-phones.
Armando - 610-1448
David - 610-4890
Private on-call night-time holiday service will likely be more available with Armando, as during tourist season David tends to work mostly for Capricorn. Armando also has a land-taxi.
Bring a couple of small flashlights with you, and carry them when you go out at night - you will be very glad you did.