Fireman Jim,
You need to join a club and be an SCTA member to be eligible to run for points and records at El Mirage. The key word here is SCTA member. I am in the Sidewinders and we have two types of membership.
The first being a regular club member, this membership in our club includes SCTA membership, which would allow you to run at El Mirage.
The second is being an associate member. An associate member is only a member of the Sidewinders, not a member of the SCTA, this membership does not allow you to run a car at El Mirage.
Both memberships require that you do a duty once a year for the club at an El Mirage meet. Which is very important, as the meets could not be put on if it were not for the dutys assigned to each club. I hope this helps.
Regards, Tom Gerardi