It could be said there is wild camping in the states, although I've never heard that term before. However, it's a big country and I can really only speak of my own experiences.
In a way, there are two kinds of camping here, maybe three, if you count a commercial campground, which is for those with trailers/caravans and motorhomes. More like a motel where you bring your own room. Very family oriented, not so great if all you have is a tent. There are even chains of those places, like Good Sam's.
There are places where you need a permit, which may or may not involve a fee. Those are typically in parks, either state or national. It can be either in a campground, just like a commercial campground, with camp store, showes, the works. Budget cuts for the National Park Service have resulted in some campgrounds being closed. There is also what is called "backcountry camping" in national parks, which requires a permit, usually free, but you can camp almost anywhere in the woods, although that doesn't mean there are a lot of good places (not where I go, anyway). Places that have a lot of dangerous animals have more rules.
Then there's everything else. I went camping a lot when I was little, never going more than twenty miles from home. But there were no permits, no rules and no neighbors. Such places were well known to local people and I imagine still are, and nearly always near the river. I think fishing and swimming were the main interest but it was still family oriented. Some places that I know of have since been turned into wildlife management areas, which means rules and sometimes permits. To a large extent, national forest (not to be confused with national parks) and I suppose state forests, too, are wide open for camping, with about the only rule being that camping might be limited to certain areas. But hunting is also generally allowed in those places, too.
I have no idea what sort of "off the grid" camping might be practised in other parts of the country. Here I speak only of the Mid-Atlantic mountains of the Applachians from the Blue Ridge and beyond.
In a way, there are two kinds of camping here, maybe three, if you count a commercial campground, which is for those with trailers/caravans and motorhomes. More like a motel where you bring your own room. Very family oriented, not so great if all you have is a tent. There are even chains of those places, like Good Sam's.
There are places where you need a permit, which may or may not involve a fee. Those are typically in parks, either state or national. It can be either in a campground, just like a commercial campground, with camp store, showes, the works. Budget cuts for the National Park Service have resulted in some campgrounds being closed. There is also what is called "backcountry camping" in national parks, which requires a permit, usually free, but you can camp almost anywhere in the woods, although that doesn't mean there are a lot of good places (not where I go, anyway). Places that have a lot of dangerous animals have more rules.
Then there's everything else. I went camping a lot when I was little, never going more than twenty miles from home. But there were no permits, no rules and no neighbors. Such places were well known to local people and I imagine still are, and nearly always near the river. I think fishing and swimming were the main interest but it was still family oriented. Some places that I know of have since been turned into wildlife management areas, which means rules and sometimes permits. To a large extent, national forest (not to be confused with national parks) and I suppose state forests, too, are wide open for camping, with about the only rule being that camping might be limited to certain areas. But hunting is also generally allowed in those places, too.
I have no idea what sort of "off the grid" camping might be practised in other parts of the country. Here I speak only of the Mid-Atlantic mountains of the Applachians from the Blue Ridge and beyond.