It is really a shame that all HS soccer coaches do not join and participate actively in the association. If they have taken on the responsibility to coach a team, then the least they can do is to become a member. I am sure it is a good support group for all coaches and you may also obtain many intangible benefits, in addition to those already stated. Some schools have ADs who care nothing for soccer.
Coaches, if you are gonna be involved in HS soccer you should do everything you can to interact with your fellow coaches. This will also show your players that you care about their success on the field.