+1 on a bin. Mine contains all my small recovery gear, duct tape, bungee cords, extra blanket, e-tool, hatchet, receiver shackle, jumper cables, etc. I even glued some non-slip carpet rubber stuff to the bottom to prevent it from sliding around on the rear cargo liner. That thing is solid. Doesn’t make a peep back there.

Personal survival wise, I would make sure you have water and a way to communicate. Someone mentioned an inReach or SPOT tracker. Hands down that’s the most important “get out of jail free” card you can own. As far as water, a filter might seem like a nice safety net but if you don’t have a water source you’re screwed, so consider loading up on long trips. Gallon of water per person per day.