Great Island has become my family's favorite places, having The Atlantic Ocean on one side and the Core Sound on the other of this narrow barrier island is our paradise, It is boat in only and only 4 wheel drive accessible, no paved roads. You can camp on the beach or stay in one of the NPS cabins. Abundant wildlife, empty beaches, our kind of heaven in the summer months, hot fishing spot in the fall.
What a hidden gem! Cabins are clean but very rustic - bathroom, bunkbeds (with clean and comfy mattresses), gas stove, stink, platic table and chairs, and a porch - just straight up fishing cabins, nothing fancy. But they are situated directly behind the dunes from miles and miles of totally prestine beaches. The only on-island supplies are ice and gasoline, so you must pack in everything. Tap water is potable but tastes very desalinated, so bottled water is recommended. If you crave isolation and wide open spaces - dont miss this gorgeous place! Be sure to bleed your tire PSI all the way down to 18 and drive 10 miles down the dune road to the lighthouse. Totally dreamy and not to be missed!
But we did camp along the beach on the island.
I've stayed here on two separate occasions both with larger groups of people. There's plenty of real estate and no need to worry about being on top of one another. There are limited facilities (a few vault toilets and a covered pavilion). You can seek shelter indoors at the Light Keepers quarters during the high season (regular business hours) if needed. There are several boardwalks that meander around the island and numerous sandy paths connecting the sound side to the ocean side.
There is a large raccoon population on the island so store your food and water accordingly. We did experience a raccoon running off with a dry bag full go food that wasn't secured to a permanent structure. It can be buggy if there's not much wind, but generally there is a breeze blowing across the island.
If you don't have your own personal water craft to get to the island, you can take a private ferry to the island. There are several companies that offer reasonably priced tickets to and from the island.
Again, this isn't a review for the cabins here per se, but relevant in that there is more camping available.