Good advice which is why I bought a batch of different sized Faraday ‘bags’ from Amazon some time back. I even keep an old laptop tucked away and some old cell phones. One never knows what they might be worth after an EMP event.
Solar Panels and an inverter too, even if it will just run fridge/freezer and maybe a radio. Spare parts, gas, guns, and ammo too.
Hide away place in the hills away from fault lines or oceans.