Guests are always welcome at NSSA National matches. Here's a one-page summary plus an interesting video about NSSA cannon, mortar, carbine, rifle, and pistol matches. Next National Match at Ft. Shenandoah, VA May 16-20, 2012.
http://www.nrablog.com/post/2012/02/18/North-South-Skirmish-Associations-125th-Nationals.aspx
There will also be a night time Cannon Match.
It has been a long time sense there has been night time cannon shooting on the range.
I think there will be 10-15 cannons on the line.
Be sure to be there.
Will be up for the week.