Wondering if camping is allowed on Nantucket Island? Sorry, there's no camping on Nantucket. According to Nantucket Online: "In order to protect the Island's fragile environment, camping (including just spending the night on the beach in your sleeping bag) is prohibited and punishable by a fine of up to $200."
There is camping on Martha's Vineyard though:
Martha's Vineyard Family Campground
Just because there isn't any camping allowed, doesn't mean you shouldn't go.
More Nantucket Travel Information: Even though there is no camping allowed on Nantucket island, there is still plenty to do and see there. If you are planning a trip to Nantucket, check out the official visitor's guide to Nantucket Island before you go.
Top Nantucket Island Sights include: Monomoy Charter's Critter Cruise, the First Congregational Church, Nantucket's Old Mill, Nantucket Whaling Museum, and the Nantucket Shipwreck & Lifesaving Museum. If you love the outdoors, there are also plenty of beaches for relaxing, exploring, and beach combing. - Island of Nantucket Info
Nantucket beaches: "From the northeastern shore of Coatue to the western tip of Madaket, Nantucket has some of the finest beaches in the northeastern United States. The north shore beaches are protected by Nantucket Sound and generally have few waves.
The south shore beaches, open to the ocean have large waves and strong currents. There are however times when a strong wind from the north causes the waves to be large on the north shore which also causes the south shore waves to decrease significantly. While this is a rare occurrence, it does happen.
Check the prevailing winds before choosing your beach for the day." - Island of Nantucket Info
Nantucket Lighthouses: "Nantucket is home to three lighthouses. The most popular lighthouse is on Brant Point. This lighthouse is familiar to every visitor who arrives by ferry. Below is a photograph of what it looks like to round Brant point when approaching Nantucket harbor. It is customary to throw a penny in the water when leaving to ensure a return visit." - Island of Nantucket Info.