Oh yes. Very much so. Although the lid was kept on that part of 'Corps lore' for a long time after WW2.
The ROC in general truly is a forgotten gem from the bottom-drawer of history. Stories about the 'ghost' WW2 ROC members began getting discussed properly from the mid/late 1980s onwards, both within and outwith the Corps.
Prior to that, people who did have direct insights on the topic kept their mouths firmly-shut (notably, those who were 'ghost' members during WW2, then overt members afterwards).
There was a similar reticence regarding any open discussion about the
British WW2 Auxiliary Resistance units until the 80s era ie 30-40yrs after the event.
My own theory (based upon direct conversations with such people, and my own experiences, born as I was in the 60s shadow of WW2) is that the elapsing of
The 30yr Rule, coupled with end of the Falklands War (plus the slow 'thaw' of the Cold War) loosened people's tongues, and also resulted in living history efforts such as Bletchley Park.
I am in a state of permanent mild shock about how much of the UK's/NATO's Secret (or at least Confidential) Cold War and home defence planning prep is now free-range fodder all over the internet.
Being old, and blessed/cursed with a whole range of relevant experiences & insights, there are probably at least a couple of books inside me about such things....but they may never be actualised.