Kevin,
I too will be topless. Gonna follow Zderf's lead and get a NOAH tarp. Part of the pre-planning will be to locate and note every overpass, overhang and covered parking garage along the route.
I know that Walt Tomsic and Kim Pallister have rag tops, don't know about the rest of the gang.
The chase car will be a good place to store the tarps, unless "I'm bulding a GT-40 Neal" decides to bring that teeny tiny Honda.
Bish
P.S. I did a weather check for that time of year (over there) and it is pretty darn dry. Thunderstorms though, are another story. We will either have to find an underpass or drive faster.