Tag, I don't think you'll have a problem. The street folks are mostly in town, and some of them have some incredible work to purchase for reasonable prices. DO take a look at what they have, but don't be afraid to tell them to no and walk away. It's not anywhere close to Mexico with street vendors. And if you find you would like an illegal substance, the word around town is to talk to the bartenders and tour guides. Use discretion on that one, if that is your fancy. I love the diving here, and there are some great people there. Have a great time!