In the booklet, she also thanks Steve Hinson (playing steel guitar), together with Holly and Ben, for helping to keep some legends' alive and well. I don't think Steve Hinson had a family connection - but he did play steel with George Jones (as he has with many other Country legends). As well as Carrie's regulars, those three do mark a special connection with the long stream of Country tradition - and it's certainly not a given that they would appear on stylistically mixed contemporary albums.
A special mention should also be made of Brian Sutton (who has also played with the Dixie Chicks, among many others). He's arguably the most respected flatpicked acoustic guitarist today, who has won Guitar Player of the Year ten times at the IBMA, as well as the 2007 Grammy for Best Country Instrumental Performance. His website describes him as "an innovator who bridges the bluegrass flatpicking traditions of the 20th century with the dynamic roots music scene of the 21st" It's a flow of elements tradition from some of the earlier strands of roots Music to modern progressive innovation, which is often misunderstood, but which I think some of the songs on Carrie's album are aiming to show.