According to a National Post report it was more than just the Trudeaus: "PM Trudeau, wife and family, Seamus O’Regan, the first-time MP for St. John’s South—Mount Pearl and former CTV broadcaster, and his husband Stelios (Steve) Doussis as well as party president Anna Gainey and her husband Tom Pitfield spent a week with the Trudeau family on Bell Island as a guest of the Aga Khan."  

According to a 2014 Jane Taber Globe article "Anna Gainey is a close friend and ally of Justin Trudeau, the Liberal leader. She - along with her husband, Tom Pitfield - is part of the new wave of young people involved in the party now because of Mr. Trudeau. They are the new power couple – and very much part of Mr. Trudeau’s inner circle. While she is the daughter of a famous father, her husband, Tom, is the son of Michael Pitfield, the former Clerk of the Privy Council, who famously served Mr. Trudeau’s father when he was Prime Minister. Globe and Mail online, Feb 2