As part of our training for the Crew Leaders of the field school, we usually conduct CPR and first aid training with the other NPS staff. We typically use the Red Cross. This is very useful to put the emphasis on safety and to help the staff (and me) to remember all of the potential sources of injury in the field. It is also a great way to start building a team.
This first day helps to guide our training of the students and ensure a safe working and learning environment for all of us. Also given the large numbers of visitors we have, first aid and CPR/AED in case of a visitor mishap is only prudent. Over the 12 years of the field school, the worst case has been exposure to poison oak. We are prepared though!