Fair enough, but my impression of the OP's question and his "I don't mean auto-x" disclaimer is that an auto-x would not allow him to fully experience what his car is capable of (lower speeds, tight courses). ADSI may not have banking or elevation changes, but it is far from a typical auto-x. I routinely hit the top of 4th gear there (100 mph+). And I think the fact that there are no walls to hit is a plus when he would be taking his 2012 STi Limited there. I've definitely pushed it a little too hard there (especially when they ran an event in the rain) and gone for a little spin and was very glad that all I ran into was more airstrip.
It was just a suggestion as I know many people have not heard of ADSI as they only run a handful of times per season and it's in little old Rhode Island.