I have a stock 2006 MX-5 soft top with factory roll bar, will that suffice?  I don't want to drive 3+ hrs, show up and the tech says "no go."  

Also have a M2000 DOT approved snell helmet  is there anything else specfically required?  I have the owners manual listing the rating, it's not physically labeled on the helmet, is that okay?

Thanks!  Hope this works out, the event sounds fun