Lots were cast for each gate, according to their families, young and old alike.
OJBAnd they cast goralot, the katon as well as the gadol, to their bais avot, for every sha'ar.
T4TBy casting lots, the leader of each family chose one gate for their group to guard. All of them, including young men and old men (OR, including leaders of large families and small families), cast lots.