Though primarily a solo artist, Williams has toured with
Yonder Mountain String Band,
The String Cheese Incident,
Umphrey's McGee and
Ratdog, and has frequently performed at
The Bonnaroo Music and Arts Festival, the
AllGood Music Festival, Summer Camp Music Festival,
The Rothbury Festival, the
Elysian Fields Music Festival,
Keller Williams Incident Keller Williams Incident is a collaborative performance between Williams and
The String Cheese Incident. They have performed together, and Williams' 1999 album
Breathe was released collaboratively under the name Keller Williams Incident. Williams and SCI began collaborating after Williams saw the band perform in Colorado, offering to play with them in exchange for free ski passes.
Keller Williams with Moseley, Droll and Sipe Williams also frequently performs with a backing band as "Keller Williams with Moseley Droll and Sipe". Formed in 2007 as the WMDs, they first played at the
Bonnaroo music festival. The group consists of Williams on rhythm guitar,
Jeff Sipe on drums,
Keith Moseley on bass, and
Gibb Droll on lead guitar. They changed their name to the WMDs in 2008.
Keller and The Keels "Keller & The Keels" is a bluegrass project consisting of Williams and the husband and wife combo of
Larry Keel and Jenny Keel. The trio released
Grass in 2006, a collection of both original and cover songs. They released
Thief, an album of cover songs, in May 2010. A new album, "Pick", with The Travelin McCoury's, was released in July 2012.The most recent Keller and The Keels album is
Speed, which was released in 2019. It features a Larry Keel song, a Keller song, and several covers. ==Instruments==