Not a bad set of instructions although I would suggest a few things:
1) Get ARs to check nets and then come and witness the toss, that way if any problems with the nets it can be sorted quicker.
2) You would be better of splitting the pitch into thirds, there third, the middle third and your third, and include about credible area in giving decisions.
3) Its great you put in about Mass Confrontation, I would be more detailed in what I would want, like the closest watch for punches, the furthest check for runners and you take the people who started it. That way you have the best possible chance of getting everyone who needs sorting out.