I saw them multiple times with the orchestra- hands down the best was Radio City Music Hall in 1993. Absolutely incredible:
https://archive.org/details/19930617MoodyBluesLiveAtRadioCityMusicHallNYC
Thank you for that! It gave me chills and brings back some long lost memories. What a fantastic experience that must have been.
Also, I had just literally read that about Sue on IMDB! Ha!