Google up Houlton Maine for something similiar. It may even be more “remote”; I think basically it’s how you define it. It still has major medical facilities and a very conservative population. The economy is slightly better that the official numbers would lead you to believe because there is a great deal of subsistence work and the black economy is alive and well.
dang - now your’re out there.
Doesn’t one need a visa to cross into “the county”?
How about some land along the CA border? What about buying contiguous land on both sides?