It might be possible to hide in the large areas of uninhabited national forests, deserts, frozen-lands, and rain-forests, to live with the natives as they do, if they will have you. A community is required. No man is an island. We need human interaction. The natives know how to live off the grid and without money. There was a tribe living, hiding in the woods of America, and were only discovered relatively recently, but they did not fare well in hiding for so man generations.
Currently, my plan is to stay informed. I see people wearing dust-masks sometimes. About 1 in 1000 people will be wearing one at the grocery stores. I saw 2 this month. These guys may have the right idea!