Just take the word "justice" out and substitute the word "judges." I think that "March for Judges" gets your message out loud and clear, and, for the uninformed majority, does not evoke the image of Sharpton, in his shirtsleeves, surrounded by 42 hanger-on, ranting and raving about some criminal not being granted what he thinks are his rights as an American, and calling that a "March for Justice."
**How about "March for WISER Judges!"?
How about "March for Our Judges?"