Useful skills and knowledge, part 4.

Leadership: worth learning.  Any group, no matter its purpose, is held together by two things: a common cause, and a good leader.  Without either, the group is severely hampered and will often dissolve.  This is especially true for small groups.  To survive in any sustained disaster, every member of the group has to act in union with the others, backing each other up and working for their goal.  For this kind of cohesion, the group needs a figure they respect and trust, someone whose word they will follow.  They need a leader.  You.

Teaching skills: never useless.  Teaching the other members to do your job ensures that they can cover for you if you are injured, and makes your group feel that they are doing something beyond survival.  That sense of progress, of achievement in a seemingly hopeless situation, will keep the group going.  Even if you have no destination, no goal beyond survival, you can keep morale high and your team hopeful by teaching and learning.