Ibbotson left the Nitty Gritty Dirt Band at the end 1975, but rejoined them a few years later.
The song, "Sara", was later recorded as "Sarah in the Summer" by Ibbotson as a member of the Wild Jimbos and the Nitty Gritty Dirt Band.
[1] The Nitty Gritty Dirt Band included it on their 1994 album Acoustic.
He sings about "driving this road as a gay divorcee" and being an "hour closer to Sandy in the summer".
It is a safe assumption that this is about his ex-wife Sandy and their daughter Sarah Jean, and that they were divorced before the LP was released in 1977.