Actually Hunaudieres wouldn't be part of it. Too dangerous. But there are other configurations around the grandstands that would work.
oh...do u have a link, or pics of the entire circuit? where u described there's many other circuits to choose from..
http://www.lemans.org/aco/pages/visite/index.html Basically you could mix Cicuit Bugatti and parts of the 24 hours track.
I think all the top drivers are good in the rain, however know that someone is forgotten. It will be a chassis/HP equalizer. This could be the race of the year.