Yes, I would recommend getting sand stakes. It is free to camp for up to two weeks, after that then you need a permit. I recommend bringing your own water, some parts of the island are far from the water spouts and bathrooms, so prepare for primitive style camping.
Yes
Yes but be mindful of the signs there are some areas that do not allow camping
Yes, but the wind can be very rough!
Yes, winds can be brutal so make sure your tent can hold up
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