The Vanuatu people are a delight to photograph, friendly, co-operative and photogenic especially the children who are simply gorgeous. Yes, they love to be photographed but please do not offer to pay to photograph local people as this will quickly discourage spontaneity and encourage commercialisation. Always ask before taking photos of local people.
In some cases, some people may be reluctant to be photographed for reasons that you may never know. It is prudent to enquire as to the fee for photographing cultural festivities as they are sometimes very high. The reasoning behind this is they put on the show, people take photos and make money selling these photos of their show - so they want to be paid accordingly makes sense. Shooting an exploding volcano at night calls for min 800 asa setting and a tripod is essential for good images.