The Stetson Family are a band based in Australia, and it should be said that in spite of their name, they are not a 'family band' in the sense that we usually understand, but through their music, they are indeed a family in the sense of unity of purpose.
It's probably also only fair to say that they are not hardcore Bluegrass either, at least in the way we understand the term today, but this is quality stuff none-the-less. I think 'folk' might be a more honest description, though they do tackle a 'grass classic in the Stanleys', "How Mountain Girls Can Love", and a Dylan outlaw song, "Billy".
But it's with their originals that this band shines. "Every Second Beat of My Heart", "Run Daddy Run", "Let It Ride" and "Lover Where You Going", all composed by members of the band, are all songs that have the potential to become classics, and I would not be surprised to see at least some of these being included in the sets of other performers.