if i had a computer in such circumstances i could build it from scratch, i've been working with the code of btcd and the protocol for years now.
if you were a genocide loving megalomaniac, and you had hard science on this happening, what would you do? definitely very important to smear anyone who starts to get close to the story. no, it's chemtrails, no it's haarp, no it's global warming.
people lived without power only 200 years ago, it's not that hard, but if you are unprepared and have no knowledge of how to do things the old way, you are planning to fail nasty.
even if we are lucky and it doesn't happen in our lifetime, long term being stuck somewhere there is no refrigeration, sanitation, water mains, or heating/cooling from electricity can happen to anyone. plenty of examples of this, some "true story" movies have been made about people who crash landed hundreds of miles from civilisation stuck in the middle of rainforest, or get shipwrecked.
modern society has inured people to comfort and ease, and nowhere near enough is being done. there should already be hundreds of large underground cities across the planet if people actually understood what a geomagnetic excursion is.