I'm not sure if the pool at Oil Nut Bay is available for visiting yachters. It was when we were there in July, 2021 but that was when crowds were small due to Covid. Soon thereafter I read a post on TTOL that access to the main resort, which includes the pool, was restricted to the residents and their guests.

It was a great pool, snorkeling was good off the beach, though the resident turtles seem to be on vacation somewhere else, and the main restaurant was amazing. The marina village was shut down when we visited which was part of the reason for us having access to the resort for no daypass fee.