It's a strange phenomenon but when people feel disillusioned with the super states that they were conned into they think the answer is to create a smaller state, never realizing that it is the concept of the State itself and abandoning personal responsibilities (self ownership) to the State [any State] that is the real problem.
Why would checkpoints in Yorkshire be a good idea for anyone?
Are Yorkshire people prepared to shoot on sight any 'Southerner' who dares to cross the line unchecked?
If you want a life that reflects your aspirations, live a life that reflects your aspirations. Don't look to a monopolized, armed gang of thieves and power seekers to do it for you. If you do you will get what you asked for - in Yorkshire, Catalonia, Ireland, India or elsewhere.