Still waiting to here from someone who knows how to run a GAF type match.
About the only thing that a GAF stage has had in common the last five years is the stage is based on a military action from the years 1865-ish to 1900-ish. Other than that they seem to run the gamut. . .there's a bit more 'action' as far as movement, crawling, shooting off horseback, other similar stage instructions. More reloading on the clock, too.
GAF has conducted their Muster under NCOWS rules(see
www.ncows.org, Bylaws #10-Rules and Regulations), with modification for allowing any military arm as long as loaded to black powder velocities and using cast lead bullet. Last year's Muster I believe allowed gas-checked lead bullets in some longarms which otherwise would not give acceptable performance, but I may be incorrect on that. It would be always based on safety and what the Match Director feels their targets will withstand.
Unfortunately August is a busy month for WAS. My home club, Blue River Regulators, will be scurrying to get ready for our big three-day shoot, "Ruckus at Raccoon Forks" in September.
I have a couple of stages written for last year's Muster that I would be happy to send you if that would help. You'd have to figure out stage layout and props to suit your situation.
RCJ