At least two sets of artists use this name.
These are photos from concerts where The Gibson Brothers played, so they may be of other bands that played the concert as well.
Del Fest May 21 - 24, 2015 Cumberland, Maryland, United States Uploaded by Topspin
Delfest 2014 May 22 - 25, 2014 Cumberland, Maryland, United States Uploaded by Zook
Freshgrass 2013 Sep 20 - 22, 2013 North Adams, Massachusetts, United States Uploaded by Zook