I have never ridden any of the local (or otherwise) dirt tracks such as Grinding Stone, I have just ridden desert/forest trails and such over the years.  I have a UTV and am interested in cruising around the track, but not necessarily racing people just yet.

What are the parameters of coming down and whipping around the track a few times?  What days and hours can this be done?  Do I need to make advance reservations/appointments?  I understand I need at least a helmet?  Any other equipment?

Maybe these are all answered somewhere in a newbie FAQ?

Thanks,
gut