The official name for the annual commemoration is "Battle Road". The schedule for this year's event can be seen at
http://www.battleroad.org/events.html
And, yes, you are correct about the French muskets. They arrived only after the war had already started. It is possible, however, that there may have been a couple of old pieces that had been captured during the French and Indian War.
There are several re-enactments of the 1781 battles this year, including Guilford Court House and Yorktown. If you wish, I can provide links.
And great to hear from you again!