Every camp must have an authorized person designated as "camp nurse". Not only do you need a camp nurse designee, have a back-up nurse "just in case". Every year several camps are in jeopardy because of a change in the camp nurse's status or life circumstance (ie inability to get time off work).

Verify nurse licensure status. In the USA go to www.Nursys.com. 
USA Medical licensure status can be found at www.HealthGuideUSA.org/medical_license_lookup.htm. 
Another source for both Canada and the USA is the Council on Licensure Enforcement, and Regulation.

An important thing to know: The USA Nurse Compact allows nurses in 25 states to work or volunteer in another state. This increases your options for whom to call upon for your camp nurse.

Information from the Community of Christ Risk Management Department can be found on the Church's webpage:
www.CofChrist.org/risk-nursing-requirements.
This includes what types of licenses qualify to serve as a camp nurse.

Be sure the nurse is current on Basic Life Support (BLS), physically able to reach any area of the campgrounds, and current on tetanus, TB, and other immunizations.

Obtain "standing orders" signed by a local doctor for the camp nurse.

Consider utilizing a form where parents can authorize over-the-counter medications for their child during camp.

Check expiration dates on supplies and medications in the First Aid kit/room and restock as needed ahead of time.

Provide a log for the camp nurse to document care and medicines given.