I just tend to have enough food on hand to last 2 weeks. If we had an extended power outage I'd run the trailer fridge on propane, 2x20lb lasts a long time for just the fridge. If the cans and fresh food gave out I've got about 2 weeks worth of rationed meals in freeze dried camping meals. I also have 4x 5 gallon water jugs that I fill if we're expecting potential power outages since I had power during the great NE blackout but the city lost pumps after a few hours due to insufficient fuel reserves (the water stations are fed by 3 different substations with one powered by the cities own power plant, don't think the engineers ever considered a multi-day full grid outage). None of this is really done as prepping, just an outgrowth of a life of camping and having 2 fridges plus the trailer. As far as cash, I only keep about $100 on me when not traveling, can't imagine what I'd need more for as it will buy me enough gas for a couple weeks of commuting or enough to get outside of the impact area of any disaster (though not with the trailer!)