My FIL was an estate worker at Balmoral, as was my late husband for a while. My FIL and MIL were invited to the Queen's coronation. I have the official letter instructing FIL to wear his military medals and coronation medal - I came across it after DH died.
DH was furious at the approbation being heaped on the Queen for staying at Balmoral with her grandsons: "Don't they understand? They're telling her to come 'home'...She is 'home'."
She was keeping her grandsons in a safe space, and the view that the Queen saw Balmoral as her home is, I think borne out by her decision to make it her final home. It's well known that one of the properties on the estate was being converted to accessible accommodation.
i recall DH telling me that the Queen's father, George VI, was known to have a helluva temper but he absolutely adored the Queen and the Queen Mother: he and his parents had nothing but kindness from them. (My MIL received a lovely letter of condolence from Clarence House when my FIL died. We passed the original to my stepson; I have a photocopy somewhere.)
DH only knew Charles as a boy, but one of DH's school friends worked so long at Balmoral that he had two long-service medals.
When the friend retired, he expected to get one of the retirement cottages on the estate, but one of the estate managers told him that this was no longer happening - it would be up to the friend to and his ancient mother to find their own accommodation. (This was around the time that the estate had started looking at using some of the peripheral properties as holiday lets.)
The friend wrote to the then Prince Charles. Charles sorted it out. The friend and his mother were given access to one of the retirement cottages.