UP is beautiful, but cold and not very populated compared to other parts of the state. We visit up there a few times a year. Love to visit but not somewhere we would live on a regular basis.
I will second what Ratso said,
the fall and spring are beautiful but only last a few weeks, and the farther north you go the longer the winter seems to last and the shorter summer is.
Visit in the winter and in the summer before you make a decision to move there.