Sting Ray Excursions, Grand Turk Activies & Mosquitoes

Hello everyone!

I'll be in Grand Turk in July on the Carnival Liberty. We're interested in doing a Sting Ray excursion and then heading over to the pool at Margaritaville for the rest of our stay. With chikungunya being such a concern right now and cases being reported from Turks & Caicos, I was wondering what the mosquito situation was for the above activities. I've never been to Grand Turk, are mosquitoes incredibly bad there? Are there areas to avoid, certain things I shouldn't be doing, etc? I nearly get eaten alive whenever they're around, so I'm trying to be careful. I came back from my last cruise with 36 bites on one leg! I'll obviously be using repellent, etc., but I'm just trying to take further precautionary measures and plan my activities accordingly (if necessary).

Also, does anyone have a recommendation between the Reefs & Rays excursion and the Gibbs Cay Beach & Stingray Encounter? Trying to choose between the two.

Additionally, we're looking to zip line in San Juan, helmet dive in St. Thomas and also do something fun in St. Maarten, if you have any tips/advice regarding mosquitoes in these ports as well.

Thanks so much!