I don't think the Greeks have been told yet where they will be tailgating. My best guess would be they would be in the green lot at Fouts, and have to walk or shuttle across at Bonnie Brae.
I heard a while back that there will be shuttles from the Fouts Parking lot for students as well as people parking in that lot for games.
Also, during our seat selection, they made it sound like tailgating would be done at cars, but people would have the option to take their stuff to the grass if they wanted to.
For what it's worth, I was also told that the pedestrian walkway across I35 had been funded and approved, and that the project would begin right after this season and be done for 2012. That one seems a little hard to believe, but that would be awesome.