Hi LOTFquest,
First, I would recommend you read
Chris Kavanaugh's story of being stranded on an island. It has some excellent comments regarding gear, equipment & supplies. Doug's analysis follows the story. At one point, he specifically mentions the time it took rescue to reach Chris' party after the signal was relayed.
Second, I would suggest you take benman's reply to heart. Signalling gear is good. As I once wrote in another post,
"Do you want to try to survive from days to a week or more with just a knife until you can walk out by yourself? Or do you want to get Search & Rescue there ASAP w/ an ELT (or EPIRB or PLB) and be home by the next day's breakfast, or at least, hopefully, late afternoon lunch?"But to answer your question with a few specifics, I'd start with the fruit you mentioned. If there are "flowers, vegetation and stuff", then it sounds like there's a useful bit of water. That's good. If you've got fruit, then you've got a source of prepackaged and prepurified water. That's even better; it makes water collection, purification and storage less critical. Without that luxury, sponges, trowels, tubing, canteens or bottles and iodine or chlorine tablets become more important.
Depending on the location of the island, you'll need some sort of shelter from whatever elements you face. That means a knife, cordage and fire starting materials (and, perhaps, a saw and/or tarp?). Sunscreen or a full brimmed hat may be a lifesaver (or at least seem like one). I don't know, but I would assume that some islands in some parts of the world might have insect problems. Repellent? I have also found a very small compact folding umbrella to be excellent portable shelter from the sun.
If someone is hurt, you may need a First Aid Kit.
It's doubtful the pigs would be a serious problem, but you could make spears if you had too, I suppose. Whittle points, char the points in a fire to harden them, then scrape the blackened tips to make an even better point. I wouldn't risk hunting unless you were very confident. I'd just stick to the nice safe fruit. Others may be more confident than me in that regard, though. Personally, I'd just be trying to avoid injury.
And, as mentioned, you will need some sort of signal. Satellite communication is the best, of course. Three "X's" on the ground, three big fires, etc. are classic signals. A signal mirror is always nice. Flares, smoke and/or dye are of somewhat more limited usefullness, but certainly may help if you actually spot a boat or plane and want to try to attract their attention while they're in sight.
This is just a list of some quick suggestions that came to mind right away. Aside from these, it's up to you. You'll likely have what you prepared yourself to have and little else.
Stay safe,
J.T.
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