Quoted By:
for me
fishing kit (rod, reel, lures, hooks, sinkers, with snorkle and goggles and a fishing sling spear, fishing line, the works fillet knife)
500 gallon water tank (would rig up a rain catch because islands get a lot of rain. plenty of water forever
an extremely expensive tent the best in the world tent for my shelter and to help catch rain fall
For friend
Cooking set (pots pans untensils spices etc.)
Pack of assorted seeds (for growing crops and getting a balanced diet)
Fire kit to start fires.
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If can only pick single item things
Multi tool
fire starter
fishing sling spear
for friend
most expensive and best tent tent
cooking pot
book about all the wildlife and wild edibles on the island