On August 15, 2015 Bob Weir joined Hamilton and his Billy & the Kids bandmates at The Peach Music Festival in Scranton, PA[REF] .
On September 12, 2015 Hamilton played with the Grateful Dead's Bob Weir, Bill Kreutzmann, and Mickey Hart at the third annual Lockn' Festival in Arrington, Va[REF] during Billy & the Kids' headlining set.