"Captain & Tenille" are one of my many favorites from the 1970's. No surprise to me that they would know Gordon,I'm sure a lot of 70s acts were close friends.
I hope they do come here to Phoenix,I missed a chance to see them at California's,Del Mar fair in 1978 at age 10.
I watched their show when I was young and vividly remember seeing "Muskrat Love" depicted by two people dressed up as cute Muskrats acting out the song in pantomime. (Yes,being little I thought they were real! ) :D
I even have Toni's 1984 solo LP,"More Than You Know",a collection of standards.