First of all, marijuana is illegal everywhere in the Caribbean. Second, you could be in big trouble is you forget your “leftovers” in your bags or try to bring some herb back home with you. And third: most crime in the Caribbean involves locals and drugs, not tourists. So why would you potentially involve yourself in danger while you are on vacation?
Don’t make a thief’s job so easy but leaving money, jewelry, or other property in plain sight. Carry them with you, lock them in the room safe, or put them in the trunk.
In some countries, you’ll need to pay a departure tax before you can board your flight home -- up to $40 in cash in some places. It sucks to have to beg your travel companions for cash or fork over a fee at the airport ATM, so plan ahead.