[TranterUK]

In the past when required I would go with two quality torches with extra batteries, one must use AAs because you can get them anywhere, pen and pencil which wont fail or run when wet and note pad, good lock knife min 3" blade pref with serrations, duck tape, nylon cable ties - a few some big some small, good for dozens of things, Good quality sighting compass, local maps and cash. Snack bars, I think you call them granola. A good quality multi tool like a leatherman is very useful. Medical wipes. Light reversible jacket. plastic bags, one large enough to put the BOB inside.

There is more, but it depends on circumstances. I haven't included a weapon, you may need to 'borrow one'.