Tuscan
Ticket prices etc can be seen on
http://www.lemans.org/
You can buy general enclosure tickets on the door, grandstand (tribune) and camping tickets will be much harder to come by now. You may have to camp off-site. Others on the forum can offer more advice on this than I.
I can send you my detailed instructions on how to get there from the tunnel or Calais Ferry port. They describe the simple route via Rouen in some detail.
FG