I agree ... Good signal mirror and whistle. Smoke is good too. you want to be actually ready for getting help in an accident more so than being daniel boone.

You're not going to catcha lot of fish. Hyperthermia kit - space blanket, powergels. Fire making.

Because of limited space these are the priorities.

Add a signal tape and flashlite like a photon ( want water proof). Also a nice chunk of folded duct-tape.