I don't really understand your question.
I just looked up what rewilding meant, as I've never heard of it before. It appears to be making an effort of reintroducing plants and animals into a designated area.
So, are you asking about returning an area back to what it was, to what humans think is valuable, or as a prospective hunting area? What would be your intent?
To me, permaculture is a less-invasive, less-polluting method of agriculture. The point of it is to
feed ourselves while minimizing damage to the planet.
If you're thinking of returning a certain number of acres back to what it was pre-1830s, and using it as a grocery store that isn't obvious to roaming hordes of hungry people, I think you are probably doomed to failure, for two reasons that I can think of at once.
1. It takes a lot of wild area to sustain a small family. Indigenous people who lived off the land that didn't practice agriculture were always nomads. They would harvest the plant and animal bounty of an area and move on to another area. After they left, the plants would regrow (if they hadn't stripped it completely), and the animals would replace themselves by breeding. Drying foods was their main way to preserve food, and they couldn't haul much on foot. They would migrate from one area to another, never staying too long anywhere.
2. Just because people live in highly populated areas doesn't mean they aren't capable of hunting. If they know of an area that has deer, elk and rabbits, they're going to arm themselves and park there until they run out of food. They may not find every single edible plant, but they will certainly collect the obvious.
If this country goes into an economic depression, you aren't the only person who will be looking to wild (or wild-looking) areas as a source of food. Seattle has a population density of about 7,100 people per square mile. Probably half those people have firearms and some even know how to use them.
Now, if you were thinking along those lines, it seems to me to be better to engage in higher-density
permie plantings that would be closer to your home and easier to protect, if you of that mind. And if you helped to create a small community where everyone helped sow, care and preserve the food, and could share the defense, the community might not be as attractive to roaming bandits as an isolated, individual place would be.
Just my opinion.
Sue