Before my trip, I had wondered if I was going to be spending more time in luxury bunkers. But Peter Campbell, the managing director of Triple Star Management, a New Zealand construction firm, told me that, by and large, once his American clients arrive, they decide that underground shelters are gratuitous. “It’s not like you need to build a bunker under your front lawn, because you’re several thousand miles away from the White House,” he said. Americans have other requests. “Definitely, helipads are a big one,” he said. “You can fly a private jet into Queenstown or a private jet into Wanaka, and then you can grab a helicopter and it can take you and land you at your property.” American clients have also sought strategic advice. “They’re asking, ‘Where in New Zealand is not going to be long-term affected by rising sea levels?’ ”
Fletch runs the YouTube channel OzarksTactical Homesteading, the description of which reads, “Liberty-minded, faith-based, pro-Second Amendment, pro–home school.” He posts videos on prepping and reviews tactical gear from his property somewhere in northwest Arkansas. Occasionally, Fletch records rants in the car. The mainstream media and Walmart door greeters—the “door gestapo”—are recent targets of his iPhone manifesto. He’s gained more than 5,000 subscribers since launching the channel in 2011.
For global catastrophic risks the costs of food storage become impractical for most of the population  and for some such catastrophes conventional agriculture would not function due to the loss of a large fraction of sunlight (e.g. during nuclear winter or a supervolcano). In such situations, alternative food is necessary, which is converting natural gas and wood fiber to human edible food.
Car electricity runs on direct current, but almost everything else is alternating current. What you need: an inverter. Some cars have them built in, but you can get one at a store for less than $40. Use the clamps to attach the inverter directly to the terminals on your car battery. Let the car run at idle and you have 110-volt AC power for as long as you have gas. With a 300-watt inverter, you'll have enough amps to run a laptop or even a television.