I never played in "Secret Garden," but I do know this: in the version that people do now, there are 2 key books. The first one is probably piano, sitar, and harpsichord (because that's the only keyboard part in the show depicted in your score), and the second is most likely harp and guitar.
You're right, Gypsy9. Ramin and Ginzler should NOT be forgotten, and neither should Robert Russell Bennett and Philip J. Lang. In fact, because Bennett was so into the stringy stuff, and Lang was all brassy, I guess it explains why they worked together for "My Fair Lady" and "Camelot."
Surprising no one mentioned Irwin Kostal. He did brilliant work for stuff like "Mary Poppins," "Chitty Chitty Bang Bang," and "Forum." He also ghosted for "The Music Man."
"How could she just suddenly, completely disappear into thin water?" - The Little Mermaid