I bring one big heavy curved upholstery needle, one small sewing needle, a singer 99 bobbin spool full of heavy nylon thread, and a plastic thimble. I think I've probably used them maybe 2 or 3 times in the past 20 years. Glad I had them when I did though.

We have lots of chert here, and in most places you could find some that has a sharp enough edge that you could probably clean small game and fish. I've used it many times to scrape some tinder fuzz for starting a fire, and I've played around using it to cut rope and other stuff. It can be close to razor sharp, I know that first hand.

I tried tooling it a couple times, and I cut myself good enough once to stop trying until I took some time to learn about it, which I still haven't done.