According to "inside sources"...
Fonda Beavers and Bill Fields were accompanied by sisters, Rachel and Becky Hebert, on vocals. Adam Beavers played drums, Beetle Fields on bass, Bill Fields on steel guitar, Becky played piano, Jerry Rogers set in on at least one song, and Tom Panter played acoustic guitar.
It was never mixed correctly (or ever released), so it is what it is, but not too bad. Southern Grace had already quit playing when it was made. The recordings came about because Beetle Fields loved the way Becky and Rachel sounded and wanted to get a recording of them singing with Southern Grace. He paid for the studio time.
It is a pretty tight sound as far as the band was concerned due to Adam's experience with other groups. He added alot to the arrangements and Becky followed easily.