I would like to have a list of field gear items for a SAR-EX/SAR. What should be in the 24/72 hour pack?

Contents may vary from region to region based on weather and other conditions. Check with your wing for specific requirements. A sample list starts on page 19 of the NESA policies and procedures at the following link: http://nesa.cap.gov/s/2017-NESA-Policies-and-Procedures-Guide.pdf