I surely wouldn't bring my wife. Ex-wife anyways. Talk about the perfect way to ruin an otherwise good time. :mrgreen:
Excluding people though, and looking at it in a practical way the best things to bring would be the longest lasting, most important tools for shelter, water, food and fire. You can make shelter and gain food with a good knife and it's the one thing I'd take if I could only have one thing. If the island has a good source of fresh, safe, drinking water than you could probably live without the destiller, but otherwise you need water before anything else. Than you need food. A fishing rod would be nice, but the line won't last forever and does that include the hooks, weights and lures needed to make fishing with it a real go? I think I'd prefer a good stainless steel 3 pronged spear head instead and with my knife could easily make spear after spear with that I could get lots of fish, crabs and stingrays with to feed me much longer. If there's the fresh, safe water source than I'd take as long lasting a firesteel as I could get. I can make fire without it. It's just a lot easier with it.