Doesn't The NSSA
have an artillery division? If it does there might be an NSSA unit closer to him than an artillery unit.
As to shock wave going backwards (away from the direction the piece is pointed), no that won't happen unless the breach explodes. but I would keep it at least 100 feet from the house. People inside watching TV or trying to taking a nap might just object to the noise.
Connect with any local reenactment and see if they have a gun coming to the event. Then register and hook up with them. They probably won't let you be part of the gun crew but you can stand back by the limber and observe and talk to them during the off time periods.
Co C 125th NYSVI
"Out beyond the ideas of wrong doing and right doing there is a field. I'll meet you there." -
Mawlana Jalal ad-Din Muhammad Balkhi
"If you find yourself in a fair fight, someone screwed up." - A new variation of Murphy's Law based on current Military experience in Iraq:
“In war the first principle is to disobey orders. Any fool can obey orders!” - First Sea Lord Admiral Sir “Jackie” Fisher