Conversation so far:
What was session work?
Session musicians, studio musicians, or backing musicians are musicians hired to perform in recording sessions or live performances.
What kind of session work did Clarence White do?
Abandoning bluegrass temporarily, Clarence White switched from his Martin D-28 acoustic guitar to an electric Fender Telecaster, intending on becoming a studio musician like his hero James Burton.
Are there any other interesting aspects about Clarence White's session work besides what session work is and the kind of session work that he did?
As 1965 turned into 1966, Clarence White met Gene Parsons and Gib Guilbeau at a recording session for the Gosdin Brothers and he began to perform live with the duo
What did Clarence White perform live with the Gene Parsons and Guilbeau duo?
Clarence White began to perform live with the duo in local California clubs and did regular session work on their records, released under the moniker of Cajun Gib and Gene.
What did Clarence White do in 1968?
Clarence White also contributed guitar to the Byrds's seminal 1968 country rock release, Sweetheart of the Rodeo.

Question: Were they successful?
Self-contained rewrite: Were The Byrds successful?