All of the material suggestions previously posted are great. I hope that you will print out the list that Flipper made.

You probably know this already (and if you do, please forgive my post), but since you didn't mention it I'll suggest that you have ALL your staff trained in First Aid and CPR. If they already know it, try and get them more advanced lessons so they can better handle large groups of people. Maybe some workshops on how to work as a team (if those even exist). Also, I didn't see a defribullator on your list. That's a good thing to have around, and first aid courses often include how to use it.