Some good states to live in that allow you to live off the grid legally are Missouri, Washington State, Oregon
Tennessee, Arkansas and Hawaii.
Those are the states that allow you to live off grid legally without facing any problems.
You could live off the grid in other states but you may face some trouble and be told you cannot do so but if you want to live off the grid without any trouble from the authorities you'd be best to live off the grid in the states listed above.