Greensky Bluegrass welcomed a host of guests during their two sets at Summer Camp Music Festival over the weekend, including a pair of members from the host bands.

Starting on Thursday night, Greensky hit the stage with special guest Joel Cummins, who came out for the set closing jam on “All Four” which you can watch above. Greensky played as a part of a pre-party prior to the festival beginning.

On Friday, the band’s festival set proper included moe. guitarist Al Schnier joined in for a cover of The Wood Brothers’ “Luckiest Man,” which the Michigan bluegrass outfit has covered in years past. Keller Williams then emerged for a fun rendition of “For Sure Uh Huh” that included a foray into Phish’s “Run Like An Antelope.”