We and another couple spent a week in Vieques, and all the people who tried to sell us drugs knew how to speak English.
Other than that is was great, and since it is technically part of the US we did not have to go through customs. I mailed myself many plant specimens that are now growing nicely in my back yard.
The ex-military base has beautiful beaches.
I’m surprised you got through the airport with plants. I recall there were signs ordering no plants or seeds from PR be allowed on the trip back to the mainland. I don’t know what possibly could be of harm tho...