You’re Stranded on a Desert Island (not dessert)

Regarding shelter, I think the tent would be a good luxury item to start with until you can get a more permanent shelter built, especially if you're somewhere wet and buggy -- you're not going to be able to sleep if you're getting rained on or eaten alive by bugs. And then later on you can repurpose the materials -- the bug netting, for example, could be used for catching small fish or minnows for bait.
That’s why I went with tarp - shelter at night, water collection in the day