""Adult intervention""? If it involves going INTO the tent/cabin, that would need a parent or guardian. Emergency situations? You do what needs to be done, deal with the legalities later. Speak at length with the parents. Maybe might need TWO adults for an "intervention" to meet the requirements. In general, do everything in public view. At the Jamboree, I was asked to counsel some troubled Scouts. I would say "step into my office" and sit down in a field 20 yards away from the camp, where everyone can see, but we can speak quietly.
We are here for the Scout. Thank YOU, Mash (may I be so familiar?) for your work on behalf of our future.