Master Audiobro's LASS or EastWest's Hollywood Strings and boost your MIDI mockup skills with our Appalachian Spring combo package. You get the original version scored for 13 instruments (including double string quartet + bass), and the full orchestral version. Both scores published by Boosey and Hawkes.
According to Aaron Copland, at the discretion of the conductor, the string section can be expanded to 8-8-4-4-2.
With LASS, you can get create a string ensemble of 8-8-6-4-2.
With Hollywood Strings, you can create a string ensemble of 7-6-4-4-3.
Nearly perfect either library!
Now add in flute, clarinet, bassoon, and piano, and you're set!