Just got back from my first visit to the FG and Stetson.....Stetson was my favorite of the multiple dive sites. I learned that being in the Gulf of Mexico and 110 miles off shore,,,,that the sea conditions can change VERY quickly....from 2-3ft. seas to 5-6ft. seas in a matter of hours with lovely blue skies!! Take along your motion sickness meds. for sure. The diving on Stetson was great,,,,vis 90ft. with water temps from 84f to 77f. Last week the currents were mild below the surface but again they can vary (your DM will brief you on those cond. you will find,,,so listen to all the briefing and heed their advise). It is an advanced level dive profile. Entering and exiting your boat is a place to ask and listens to the directions given. My deepest dive on Stetson was 90',,,,and is a great place to dive Nitrox if you are certf.. I saw TONS of fish of hundreds of species,,,,both in small groups to large schools. I encountered sting rays//eels//lobsters//sea worms//brittle stars and wonderful sponges. The site is the top of a large salt dome. I did not see them,,,but both shark and mantas were observed during my visit. A few small jellies were also in the waters. Hope this helps....be safe first and have fun....report back. By the way---whom are you chartered with for your trip???