We're in Portland Oregon.
I haven't lived anywhere else since becoming a parent so I don't have first-hand experience to use for comparison/contrast, but we love it here and feel very free to live as we please.
My understanding is that you write a letter of intent, and there is testing in 3rd and 5th grade, and not sure what happens after that. I do know a lot of people don't register and don't test.
We have a pdx (means portland) unschoolers group and there is...