I already live in a small rural town better than 10 miles from the highway. I think I’m good here where I’m on familiar ground with good conservative neighbors.
And that’s the key. Anyone planning on “migrating” during a catastrophe better realized they’ll be persona non grata in most rural areas and small towns. Sustainability means the middle of the country where there is potable water, tillable soil, and enough land to survive on. And as few other people as possible.