PL & APL, or Sixer & Second, etc, and alternates, take turns leading their team blindfolded.
Enough blindfolds, or use neckers.
Blindfold all but the Patrol Leader and Assistant.
Have them guide their members safely, together, through obstacles. In the woods, this is even more fun... over logs, under fallen trees, not hitting anyone in the face with a branch.
Switch up with other patrol members.
Teaches taking care of your team, but also in reverse teaches those who are blindfolded, to trust their chosen leaders. (this is the harder part, when they reflect afterwards, usually)
Time depends on where you are.