It might feel like a reunion show, but Rich Mattson and Baby Grant Johnson have remained active as the Bitter Spills for 17 years. The 2023 Homegrown show is a bit of a reunion nonetheless, because the duo played the festival eight years in a row from 2007 to 2014, then sat out the next eight years. At last, the chicken has called them back for more traditional folk, blues and country tunes from their four albums and uncatalogued repertoire of additional rags and hollers.