Whilst it was a hypothetical situation, it turns out fate has decided my near future will indeed involve packing light and surviving in a tent surrounded by sand and trees, for more than one day.
Ok, so it's not on an island, and apparently there's a nearby village supermarket which may or not make food simple, but I still have to figure out a sleeping bag and whatever the fuck else I'm going to need, whilst hoping the "tent" actually turns out to be sticks or bricks and containing appliances...
Trying to remember my last time in a tent... some time last millennium, but nothing's coming back to me...