Michigan trespassing laws are expected to cover such varied situations as hunters crossing rural property lines (where you see those obnoxious signs posted every 50 ft or so by frustrated property owners) to panhandlers in boutique shops (for a single "no soliciting" sign usually suffices). The terms are fairly clear, but they require a bit of interpretation to meet a specific application.
Most of the threads on this forum addressing trespass address the aspect ofrisking a misdemeanor charge. Bronson, you are on the mark with your concerns about risking our protections under MCL 780.972, which youcited above.
I expect most prosecuting attorneys would be reluctant to pursue charges related to a case of self defense, but they might choose otherwise. I would not want to be placed in that situation.
More likely, the civil suit protections provided by P.A. 314 of 2006 would be declared null and void in the courts, leaving the final results open to decision by the vagaries of a jury. I know I definitely want to avoid that situation.
Act No. 314,P.A. 2006
Sec. 2922b. An individual who uses deadly force or force other than deadly force in self-defense or in defense of another individual in compliance with section 2 of the self-defense act is immune from civil liability for damages caused to either of the following by the use of that deadly force or force other than deadly force:
(a) The individual against whom the use of deadly force or force other than deadly force is authorized.
(b) Any individual claiming damages arising out of injury to or the death of the individual described in subdivision (a), based upon his or her relationship to that individual.