The Byrds
(complete set list and running order unknown)

The Nice
(complete set list and running order unknown)

Country Pie/Brandenburg Concerto No. 6
Confirmed: Available on The Nice : Five Bridges Suite [LP] (1970)

(Unconfirmed set list from 19 December 1969 and 20 December 1969 — not likely the same for both nights)
Hang on to a Dream
My Back Pages
Pathetique Symphony No. 6 (3rd Movement)
Rondo
Ars Longa Vita Brevis
Little Arabella
She Belongs to Me
Five Bridges Suite
Intermezzo: Karelia Suite
America
War and Peace
Possibly partially available on The Nice : Elegy [LP] (1971)
Possibly partially available on The Nice : Live at the Fillmore East, December 1969 [CD] (2009)

Sons of Champlin
(complete set list and running order unknown)

Dion
(complete set list and running order unknown)