Jelly shoes and something to sit on!!
Clothing/Shoes/Weather Gear: Bring sea/jelly shoes to get in the sea. The are NO BEACHES (not even pebbly ones) so access to the sea is always over rocks, sometimes urchin infested!!
Camping/Beach/Outdoor Gear: Due to the lack of beaches, a bed roll might come in handy just to sit on betwen dips in the wonderful clear sea!
Snorkelling gear or regret it!!!
Miscellaneous: I know it's heavy but take your snorkelling gear - when the sea is this clean and this clear, it would be a crime not to sea the underwater world!!!!