Consider adding:
  • Cash
  • A way to charge your cellphone
  • A way to make fire (Id recommend redundancy here)
  • A way to disinfect water (fire and something to boil water in can be enough)
  • At least one blanket per person
  • A broadcast radio receiver (as a ham radio operator I would instead bring ham radio gear, which can also receive broadcast radio)
  • Duct tape
  • Cordage
  • Writing materials
  • Minor car repair materials (rescue tape, wire, tire plug kit, alumaseal, fuses)