Last week we saw nurse sharks at Trunk, Maho (saw the one at Maho three different days) and Waterlemon, and a baby black tip swimming in the water infront of Island Blues.
I just got back last Friday. We snorkelled at Trunk 2X's, Hawksnest, Cinnamon, Lovango and Smuggler Cove(?) and not a shark to be seen for us. Good luck and enjoy yourself!
We saw a baby black tip at the beach at the end of the reef bay hike and a nurse shark at Francis Bay. Nurse sharks are bottom feeders like big huge catfish and don't come after large prey. A baby shark wouldn't go after huge prey either- just little fish it gobbles up. We were never scared.