I think the ultimate form of prepping is meal prepping. By regularly cooking batches of food, you automatically get a really good backup throughout. There are no extra steps required. The last place you want to be during a disaster is at the grocery store or stuck in traffic.

At any moment I could go for at least two weeks without really worrying about food or how it would even be prepared. I've got a standby generator for the house and a smaller unit just in case that one dies. There's enough fuel on site to keep my fridge running for about a month in the worst case.

You want to be the last bear to exit the cave. The longer you can hold out, the less competition you'll have to deal with. The only other option is to get out before the disaster hits. This works great for hurricanes but not so well for earthquakes.

Going out searching for more food after 2 weeks just ensures you're placing yourself amongst people that haven't eaten in 2 weeks and are willing to do anything they need to in order to eat.