The Sweet 16 of BSA Safety describe the measures we should use at all Scouting activities. The eleventh point of the Sweet 16 is Communications (see below).
Scouting activities are group activities. It doesn’t do much good if the supervisor knows all the rules, regulations, and procedures but can’t communicate those to the participants. What good is that plan you spent so much time on if you didn’t share it with others?
And don’t forget about communicating your plan for emergencies. It’s not very helpful if the only person who knows how to get to the local hospital is also the person who is injured. And is there somebody back home who knows your plan in case you don’t come back on time?
From the Sweet 16 of BSA Safety on the Scouting.org website:
The supervisor needs to be able to communicate effectively with participants as needed during the activity. Emergency communications also need to be considered in advance for any foreseeable contingencies.