'I think it absolutely helped his mental state and built his mental toughness to deal with all these sorts of things.'
The trip is a surprise move - given that previous Bachelors have been required to be in Sydney and Melbourne the week of the finale episode.
This is to enable them to give press interviews along with the winner of the series.
Nick's sister Bernadette posted a photo on social media on Saturday fuelling speculation he is indeed single again.
The snap showed the rugby star relaxing on a beach during sunset with a handful of family members and close friends.