1. An adapter plug set
  2. Flashlight (which you keep in your pocket at night, so when the power goes out you can find it)
  3. Sheet sack (a sheet version of a sleeping bag, to reduce the toll of bed bugs)
  4. Protein bars, for when there’s no food around
  5. Water purification tablets (otherwise the only safe thing to drink is beer, and you'll have no memory of the trip)