Sorry, I didn't mean to imply that I thought that there was anything wrong or untimely about Charles' behaviour, or that he isn't grieving.
What I more meant is that the article is - at least the way I read it - implying that Camilla went off on a holiday, leaving her grieving husband behind by himself. I felt like they wanted me to have this image of Charles, alone in a drafty castle with only a bottle of gin to comfort him in this time - when we know that he's actually with his parents at the games (regardless of whether his presence there is because of a sense of duty or a vacation). Sure drafty castles and gin may still be present, but in a different context.
To me what seems more likely (than what I'm feeling is implied by the DM article) is that this vacation was planned some time back, as was Charles' trip to the games. For whatever reason, Camilla chose not to be with Charles while he attended the games (I'm not implying anything there, I don't know if she usually does or not) well before the death. Given how the pair of them always seem to have a genuine closeness, I wouldn't be surprised if after the death they discussed this separation and decided together that Camilla should still go on her vacation while Charles goes to the games (although that is my own assumption).