Kevin,
You'll have a bunch of fun!!!
The helmet requirement is a DOT rated helmet I think? They were'nt checking when I went last time so long as you had one.
You must also have long pants on. You'll want flat bottomed well fitting shoes also. You must have a hard top or GTS if you run
below 13. seconds I think.
You'll be able to run several times so don't show up with an
empty tank. (you don't want a full tank either due to wieght)
Good luck,
Steve