Roger,
When I was in Fiji I was staying at the Sheraton Resort in Nadi, the Fujian people at the resort organized activities for the young kids to do, which left the parents to do whatever they felt like, I do not not have children but this arrangement certainly had the kids preoccupied and in turn left the partner to relax ,swim , sunbath , etc..., and to go GT fishing!!
P.M me if you want some contacts for fishing in Nadi.
Steve.