The night of  The Last Waltz has always been on my very short list of "anywhere you could have had the chance to be...." and when describing the appeal of the Grace and the Nocs to the uninitiated, I've been tempted to simply say that if they'd been performing a generation earlier, you would have likely seen them invited up on that stage with the other musical heavy hitters.  Your lead really drove this point home for me. 
Thanks for the details,  and now I'll add this Ramble to that "very short list" of mine.