Commenting on this post:
Seriously, sailing on the ocean will NOT work for 2/3 of people. Too much motion, it can be difficult for days at a time, and you can’t turn off the ride and get off. But almost anybody could rehab a funky 30-40′ houseboat, and just plain disappear. With a water draft under 2′ and an “air draft” under 11′, they can cover most of the South – far away from cities and highways.
Just look at a highway map, and all of those rivers that cut between them. The highways will gridlock, but the tidal rivers will be great, both for hiding and later for travel.
I’d get the cheapest houseboat with a frozen-up gas engine – you can get them almost for free. Then repower with diesel (easy), get it “river-worthy”, and there you are.
Get a few big camo nets, pull under a big oak tree on a bank, and disappear while the craziness sorts itself out. All miles and miles from the nearest road bigger than a farmer’s track.