Don't put any criminal history in your ps. Only in the addendum, nowhere else. Misdemeanors aren't usually a problem unless they are fraud/character related. I had a buddy who was in law school and had three or four convictions- all misdemeanor, a DUI and a few public intox from undergrad, I think. He was fine and like you had a killer LSAT.
You'll be ok, just don't focus on it so much. Your ps is an explanation of why you want to go to law school, not why you shouldn't be denied.
How your post comes off as selfish or self-righteous, I can't even guess. Your here asking for help to a question, impossible to do without being selfish. You're trying to justify a problem, impossible to do without being a little self-righteous. Some people will judge you based on the "morality" of the convictions, my advice to that- ignore them, they can't be objective. The admissions people will be more objective than subjective, at least they should me.
There are a few older posts where people are asking the same question, or worse- there is a felony. They are on LSD somewhere, sorry I can't remember where. Good luck.