This is exactly it. I keep protein bars, sugar-free Gatorade, and water rolled up in a winter-rated sleeping bag and then wrap a blanket around the sleeping bag. I also have a shovel and a small container of salt that works in frigid temps.Emergency Supplies Maybe. Nothing to fancy but a warm blanket, some candy bars, and don’t let the tank get below 1/2.
I been stuck in blizzard before, basic supplies will make it a pain in the butt, not a emergency.
And if you run out of water, you can always grab some snow.