I was there over the summer for 2 weeks... Cars are DEFF not a strong point of that place. The roads suck everywhere. Huge potholes, construction everywhere, dirt, rocks, cows (yes I said cows). I saw 1 run down, purple v6 bird and no other f-body's and no vettes. There were a FEW nice cars, saw one Porsche Cayenne Turbo and a few Mercedes (all SUVs) but thats about it.
Now that said, that place was absolutely BEAUTIFUL and I would love to go back! Just don't get run over and stay out of the bad areas.
Good luck, and snorkeling was a BLAST! Oh, and watch out for the nude beaches, they are NOT all they have cracked up to be