There are two marinas
near Nadi (pronounced 'nandee' for those of you who haven't been there), Denarau and Vuda (pronounced 'voonda') Point. Denarau is closer to the city of Nadi but is much more like a Southern California
marina. Vuda Point is farther from Nadi and is better protected from weather
but is more rustic.
There is wonderful sailing and exotic, beautiful places to sail not only in the Yasawas but also in the closer Mamanucas. The paper and electronic charts
are terrible, though, and many cruisers rely on Google Earth
. If you're into surfing, there's some world-class spots very near Nadi.
I have no knowledge of importing a boat to Fiiji, sorry. It wouldn't surprise me, though, if you couldn't find a selection of boats in Fiji for sale
Fair winds and calm seas.