Nice review of the Merlefest Weirbacks from Jambase
"San Francisco's favorite jamgrass band has been making a name for itself with a unique brand of boogie. With acoustic instruments, The Waybacks meld folk-rock, newgrass, pop, and even a psychedelic jam or two. Friday night on the main stage, the group, along with Bob Weir, performed an inspired set, playing "Jack Straw" and a couple of crowd-pleasing covers, "Tomorrow Never Knows" and "19th Nervous Breakdown." Later in the set, people were looking at each other in disbelief. Was that "St. Stephen" > "The Eleven" > "Last Time" they just heard? At Merlefest? Indeed it was. With all the attention on Bob Weir, it would be a shame to overlook the talented Waybacks. Multi-instrumentalist Warren Hood was excellent, blazing fiddle lines around the rest of the band. The set had everyone on their feet and dancing, a rarity on the main stage.

But the highlight of the weekend was the Waybacks' extended Hillside Stage set Saturday evening. The 45 minutes that were scheduled turned into almost two hours of jamming. They hooked the crowd with a couple of tracks from their new album, From the Past to the Future. Then Weir joined the band for "El Paso" followed by Sam Bush for "Kazmir" and "Brown-Eyed Women." The crowd cheered Gillian Welch and David Rawling's appearance for "The Weight" and "Brokedown Palace." The crowd refused to let the band leave, pushing the set long past its official time, and everyone returned for a raucous "Like a Rolling Stone." For his magical playing at the festival and many guest spots throughout the weekend, Bob Weir earns the title of Merlefest MVP."