Here’s a quick, fail‑safe system: create a master sheet with four columns—Category, Item, Qty, Notes. Use a simple color key: red for high‑risk gear, blue for hydration, green for essentials, yellow for backup. Print a laminated copy for the back of your gear bag; if the power dies, the paper stays readable. Add a “Last‑check” row at the bottom; tick it off each night before you head out. Keep the electronic version synced to your phone with a low‑battery icon reminder. That way, whether the lights go out or the spreadsheet freezes, you’ll still know exactly where the machete and the extra water bottle are. And remember, the final final version is the one you check off at dusk—don’t let the “draft” version get you caught.