Do you take a knife along while tubing? If so, what kind, and where do you carry it. I'm thinking about carrying something to cut me loose in case I get entangled in some line.
I like these the best: https://www.amazon.com/Pack-Our-Favorite...zor+cutter+tool
Lightweight, compact, instant deployment, cheap and disposable if they get rusty, instant spring retraction for safety. Can be carried on you wrist using a hand or neck band or anywhere else where you can get to it quick. Sharp enough to work on heavy line, even anchor line in an emergency. There are also heavier versions available at higher cost.