The Catskill Chill Music Festival made its debut in Lakewood, PA last weekend, bringing thousands of music fans – ChillFam – to the annual festival. Chill closed out the summer in fine fashion, with tons of great talents from the jam scene playing great sets.One of the hallmarks of Catskill Chill is always the collaborative nature of their offered performances. Whether it’s planned super jams or tributes, or unplanned guest appearances, the festival never fails to capture that family vibe. One of the best came during a set from Keller Williams’ Grateful Grass, who paid tribute to the Dead with a great set.In the video below, the medley starts with a progression that sounds like “They Love Each Other,” but Keller leads the vocals on “Cumberland Blues.” Eventually the band does go into “They Love Each Other,” closing out the run of these great Dead songs! Naturally, they call the song “They Cumberlove Each Other.”Watch it all go down below, courtesy of 215music.