Minnesota has a very robust set of 2A laws. Look up the Minnesota Personal Protection Act of 2003 (MPPA2003). Crafted by 2A a law professor, former sheriff, and other 2A proponents. In addition to offering the option of open or concealed carry, it regulates the placement, wording and size of guns prohibited signage, and offers little to no penalty for carrying where posted.   It's one of Minnesota's best kept secrets.