Of what would your dark ages consist? Tell me and we’ll fix it.
______________________________
Power out for more than three years due to grid disruption or attack
OK. Here are multiple methods to put together to last three years.
LIGHT
Solar chargers, rechargeable batteries
L lights – (solar lights)
Jar candles
Oil lamps and lamp oil
COOKING
Canned heat and Sterno Stoves
Propane outdoor grill
Barbecue grill and charcoal
Japanese grill that uses 5-7 charcoal briquettes
Rocket Stove
Outdoor oven uses small propane bottles
Outdoor fireplace with rack for cooking
FOOD
Stored grocery store food, use first.
Long Term Professionally Stored food good for 20-25 years to use after grocery store food.
That list is basic. Personal supplies you know about.
The Rocket Stove, to me, since I have investigated that, would be essential to last three years or more, like forever. There is going to be biomass fuel for it - twigs, small limbs, etc. Takes such small amount of natural fuel to operate for max heat, it is the winner.
Suggestion for toilet paper when there is none: I don’t throw away big phone books when new ones come. Would hate to do it, but that is backup toilet paper.
Liquid soap is likely cheaper at dollar stores than anywhere else. Use liquid soap for everything, including shampoo if that runs out.