As mentioned above, topless is permitted on any beach, but total nudity is technically illegal. That being said, you'll find that Saline is the beach where you're more likely to find clothing optional, more so farther from the entrance. You'll sometimes find similar at Gouverneur, but at the end away from the entrance.

Also as mentioned above, there is no shade on any beach, and services are limited to a few hotels (St Jean, Flamands, Grand Cul de Sac) and restaurants (Grand Cul de Sac, Shell Beach, St Jean). There are no services of any sort on Gouverneur, Saline, Colombier, Lorient, and the areas of other beaches away from the few hotels and restaurants.

Skip Toiny. While Le Toiny now has a restaurant on the beach, the water there is dangerous.

If you want a beach with services, consider the area of St Jean where the Tom Beach Hotel is located.

If you want to be more remote, Saline is a good choice. There is a good creole restaurant at the end of the parking lot farthest from the beach entrance, Grain de Sel.

Governeur is a beautiful beach. Santa Fé, the restaurant at the top of the long, steep hill leading down to Gouverneur is an excellent lunch spot, but it's a drive back up the hill, not a hike. Please stay off of the dunes, as there is a dune replenishment project in progress.

The hike to Colombier is fairly easy, with a choice of two routes. The high route leads down from the Colombier lookout. The low route is from the end of Flamands.