Do you mean in the US? There are many countries around Europe with large populations of traveling folks - they even have cars and setup camps only to move furth

Do you mean in the US? There are many countries around Europe with large populations of traveling folks - they even have cars and setup camps only to move further when they feel like it. As far as I know there are many countries where no one asks anything if you set a tent and spend the night, especially in the mountains, but more generally on land that is not privately owned.