The Ten Eight Essentials
Since we are not camping, and many museums and other buildings have safety regulations (especially in Washington, D.C.), knives and lighters can actually be a hindrance on city trips.
Hydration (1–2 quart/liter-sized water bottles or Camelbak-style reservoir)
Nutrition (2–3 granola bars, energy bars, candy bars, GORP, whatever)
Navigation (compass, copy of map)
Illumination (headlamp or flashlight)
Insulation (extra clothing, fleece, warm hat, and rain jacket under “clothing” all count)
First-aid kit (the crew brings a kit, but carry a small one of your own, including personal medications—and you must advise adult leaders about any meds)
Emergency shelter (space blanket/poncho)
Sun protection (sunscreen, sunglasses, UPF lip balm, hat with an all-around brim, long pants and long sleeves)