Jim, I am struggling to understand how there are "thousands" of MRT members. How many teams are there (non mil?).
P2probe is right, there is no guidance on extraneous ground troop training. The project is all about aerial support for national search and rescue missions. The air ambulance and police fraternity don't cross pol with ground troops, so why is SAR any different.
At the end of the day, aerial SAR and ground troops have the same aim but there isn't a correlation for training needs.
How often / what percentage of operational tasking requires trained MRT's to be in attendance? [Mountainous regions and long established Misper's is all I can think of].
Training thousands of 'supporters' is not a practical nor essential proposition.