Each club, and conference has a plan that is followed for emergencies. For the most well written (due to necessity, and number of people), contact the Center for Youth Evangelism (located at Andrews University). They put on the Oshkosh camporees.
The basic plan (meaning anyone who reads this can take it and adapt it to their club, resources, and/or other needs) we use is as follows:
*List of medical personnel: (Great! My club has a MD and 2-3 state licensed EMS personnel)
*Leadership: (Usually the director. The mitigate all sorts of issues all the time. If they don't have medical knowledge, they appoint somebody who does. If somebody more qualified is available/needed, that person is put into place (if needed).
*Press: (a designated staff member, for a club event; a designated conference officer, for any conference, union, division events)
*Strategies for children: (Counselors take care of it. Each has their own way. If someone doesn't have a way, they get someone to help them.)
*Emergency VS. the Club: (the Incident Commander oversees all parts of the incident. They designate a club leader and a incident leader. However, usually you can separate the club from the incident to a greater extent. Usually our club medical people and director (if around) or counselor take initial control of an incident. Once more direct medical arrives or structured leadership is set up, the club & incident are split to take their separate courses.)
*First-Aid Kit: (Because this is America (where I'm living and working with Pathfinders right now), our club first aid kit is limited. We have the basic first aid equipment. Any epinephrine is supplied by the parents of the child and carried with the counselor. Our EMS people often bring their own kits, but those are used based on the "scope of practice" statute(s) of our state and their own liability (the club is not liable for their care, etc). Many of our staff, but not all, are trained in CPR (we also have nurses on our staff). I'd love to make all of our staff have CPR though. It certainly is a benefit.)
*No 911: (Wilderness EMS practices are automatically used by my club when EMS will take time to get to our location. A knowledgeable staff with wilderness experience is usually tasked to get to where help can be summoned. I also am an Amateur Radio operator. I will often carry a radio with me (FCC allows us to make contact by any means during an emergency).
*Post-traumatic counseling: (I have no clue. But I'm guessing that it is most certainly available, either directly through the church or via church insurance)
I hope that this is helpful. To develop your own club's Emergency Preparedness OGs/OPs (Operational Guidelines/Procedures), check out the NIMS system by FEMA here
and the ICS system (which is part of NIMS) here