I am not sure if this has been posted lately, but you can sign up to work the corners as a flagman or other duty at the FIM Superbike Races at Laguna Secca. Of course it is too late for this year as the races are this weekend. I did it a few years ago when the MotoGP was still at the track. We got free camping and got paid $200 for the work. I was a flagman assistant at the corkscrew, turn #8. It was a blast seeing Rossi and Lornezo et. al. going around the corners.
You sign up through the U.S. Auto Race Marshalls (
www.usarm.org) web site. You have to join the organization for one year, but the fee is minimal.
Dave