I looked, and I clicked, and I did everything but join so I could learn the secret handshake, but I was not able to find the first bit of information about where those folks are going to be when they wear orange.
Living just outside the state capitol I have a good idea where the folks near me are going to commit this act of Irish insubordination. But that does not help anyone else who does not live near a state capitol. The lack of public information is an on-going tactic of these organizations. They often contact news outlets just before the event so as to keep the locations "secret" until they can get "video at five/six/10/11".
It's also their common tactic to stage these events on a weekday when people with real jobs cannot easily attend. Also, they seem to time these events so as to avoid the lunch hour when folks working nearby might drop by to express a counterpoint view.
To end this rant - the schools will most likely give excused absences, under the guise of "learning cvics in action", to the kids that get dragged there. Or the school might turn it into a "field trip".
My black vest has "GUNS SAVE LIVES" embroidered in neon orange thread across the back. Think I'll wear that so I can fully participate.