*with grain of salt* I didn't race in the ARRC last year, but I was there with Trans Am as a worker. For me, interfacing with the workers, the event was nothing more than a regular old regional race. ITA was a decent battle last year (and there was a Honda or two near the front), but the rest of the classes in the grouping was kinda of a bust.
All that said, Road Atlanta is crazy with almost all blind corners. I want to drive it!
The other nice thing is if you don't do the enduro, you probably could have all Sunday to get back home.