All of the beaches are amazing and Cruz Bay is fun at night. Definitely get a car and drive the whole island. The most popular hike is from the Nat'l Park Center over to Salomon Beach. We went 1st thing in the morning (take some water) and had the beach to ourselves for a few hours. We saw a green stingray and a turtle swimming along the shoreline. Snorkeling was pretty good on the right (east)side. There's a store within walking distance from the Westin for room snacks etc. Westin pool is very nice. We also had a fun day snorkeling and over to Jost with Surf Safaris, google 'em up and see if it's a good fit for you.