I'd like to move the series to the U.S. but Doug doesn't have many US tracks (CoA) unless you add in the AH tracks. Those, unfortunately, would probably need modification for 12 car fields. On a positive note, there are some other tracks out there that look promising. Here are the tracks I would select at this early stage:
Circuit of the Americas (Austin, TX) http://lucidphoenix.com/sc/tracks/cota.pdf
Created by Doug Schulz
Barber Motorsports Park (Birmingham, AL) http://www.nvcc.edu/home/mpolcen/redscape/speedcircuit/Barber.pdf
Created by Phil Lewis
Mid-Ohio Sports Car Course (Lexington, OH) http://www.nvcc.edu/home/mpolcen/redscape/speedcircuit/Mid-Ohio.pdf
Created by Charlie Heckman
We've got loads of time on this for input.