Other members included John Hall (who went on to Orleans), Barbara Keith and Ted Speleos.
In 1969, he became a member of Ian and Sylvia's country rock group Great Speckled Bird.
Smart, Jim Colegrove and Jeff Gutcheon formed the group Hungry Chuck in 1971.
In 1973, Smart played and completed one tour with the Fallen Angels, Gram Parsons's group.
Smart was the drummer for Hello People on their 1974 album "The Handsome Devils" (produced by Todd Rundgren).