I attended a Byrds date in the late 1960s. Don't remember much of it, other than that it impressed me less than the Jefferson Airplane concert in Amsterdam, also in the late 1960s, where Jim Morrison, who was supposed to play next with the Doors, acted like a fool and subsequently fell ill.
The Byrds were a great group though, and I have many of their albums on CD, from Mr Tambourine Man to Sweetheart of the Rodeo. Don't care much for their later albums.