If a Cadet needed to go to hospital then they would need two staff to escort them, then the remaining staff member (on their own now) would now leave a ratio of 14:1…so you would need 4 staff in total to start with. But then you wouldn’t have a driver with sufficient rest for the RTU or transit to/from hospital.
May just as well take a minibus full of staff and use the photos taken for Air Rec back in the zero-risk environment of the Sqn HQ. You can then stop off at the pub on the way home (with a designated driver or course!).
But, if you did the CACE then you won’t be able to get VA, claim fuel or even have an MT bus in the first place so the activity had/will never happen.
May just as well start collecting stamps or join the Air Scouts.