While reading and absorbing as much as I can to prepare, I've come across different groups. I've seen NASGA, SSAAA, SHAG, and others. SSAAA and SHAG are membership groups. Does one have to be a member of these groups to participate in games they sanction? Its a bit confusing cause none of them specifically spell this out, but I read some things that made me think they did. I did read that NASGA is only there for record keeping. That they are not a membership "club".

Should I join one of these groups?