I got to try this course in the spring shoot at Friendship. It was a lot of fun and the fellow running the match was very kind. I'd never done one before. He told me that time worked like this: the course is an out and back. You travel out, then shoot 5 targets on the way back. No fire starts etc. Anyone who isn't back at the starting line within 10 minutes is disqualified.
However, as long as you are under 10 minutes, time only serves as a tie breaker. He told me that some of the expert shooters had concluded it was better to walk swiftly between targets rather than run, so as to keep pulse and respiration rates lower. I decided, however, that I'd have more fun if I ran like $#*! in between targets (load at each station, no running with a loaded gun)! I ran it twice, once in the flintlock category, once in the open category. My first run went really well in terms of targets hit and I was well under time both runs (actually ran the same time to the second). The targets were pre-hung by the person running the match so they were a surprise to me on the first run.
They also allow non-period footwear for safety sake. That grass is slick as banana peels wet or dry, and they don't want any broken legs.
Have fun out there!