I did this last year. We got off 24 an exit or two after Murfreesboro, Beechgrove, I think, and headed in to Manchester on hwy 41 (or hwy 2, depending on the map you're looking at). We didn't hit any traffic at all until we got into Manchester, on the road leading to the entrance to the Farm. We got in line on that road and was inside in about 45 minutes. We will definitely be doing this again for 09.