I'm from the Bahamas, lived there for over 20 years. I'm not sure about Ft. Lauderdale but I know the Bahamas is very strict about cannibas.
Whatever you do, don't buy off the streets in Nassau or Freeport. The chance of the seller being an undercover cop is very high.
The Bahamian government goes out of their way to target marijuana users ( sometimes at the expense of focusing on real crime) and unlike other Caribbean countries, it is nearly impossible to pay anyone off to get out of trouble.
Also be very aware when walking the streets. People there offer to sell you drugs and once they have you in a secluded place, the likelihood of being robbed goes way up.
Not trying to scare you but my country in going through some rough times, and it is showing by the rise in crime. I remember when anyone could walk any street in Nassau. Sadly this is no longer the case.
Feel free to PM me with any specific questions. Whether it be questions about food, tours, or attractions, I'll try my best to point you in the right direction. Enjoy your trip, but just be aware of your surrounding.