From what my old mind remembers, Laura Cunnningham was/is from Louisiana.
I remember being in horn arc during everydays at Smoothieville (Embrieville Mental Facility?) and hearing this AWESOME tone playing in the distance. It was Laura "auditioning" for Jack Meehan.
We all looked at each other - "WHO IS THAT????"
Needless to say, she had the solo about a third of the way through tour - rightfully so. I'm pretty sure Rick Wygant wrote the solo as you hear it on the recording but I could be wrong.