From reading several message forums (a collection of boards), boards (with one topic and a lot of threads) , PMs and emails, I have determined the following:
Alexandra, Pauline, Louis, and Camille were at the Palace during the service. There was a fuss with one of the little girls which caused her mother to delay Albert and the other sister (I do not know whether Caroline/Alexandra or Stephanie/Camille). The walk took longer from the Palace to the chapel than anticipated. This all lead to the late arrival and start of the mass.
There was a big family dinner with the Grimaldi trio and all of their children (and in Caroline's case-spouse) after the service. They used the same dishes Rainier used after Grace's funeral--supposedly her favorite set.
Stephanie and her children stayed over at the Palace though I thought they were moving in? Caroline, Ernst and Alexandra stayed at their house in MC. I don't know if the Casiraghi Trio helio'd out to Nice and beyond that evening or the next day.
No, Nicole nor Eric Alexandre were not [seen] in Monaco the entire day.
I think I need to find something else to read for a bit. I'm getting a tad obsessive and it would creep me out if someone were like this over me and my family.
Ann