Understand
The main town of any size between the International Airport town of Nadi and the Capitol of Suva is Sigatoka, located approximately one hour east of Nadi on the Sigatoka River.
Beyond Pacific Harbour, you'll find very few accommodations and places to stop before you reach Suva, the capitol and largest city. Do find an opportunity to visit Suva if you find the time, however. It's about 45 minutes east of Pacific Harbour, and despite your greatest fears, is not that hard to drive in nor navigate. Be aware of pedestrians and take your time and you'll do fine.
