We'll arrive in Fiji on September 17 for a 10 day stay. We want to get the full island experience with day cruises since will be staying at the Hilton Denarau. We 're leaning toward Whale's Tail and want to do Rivers Fiji raft (not kayak) day trip. Has anyone had trouble booking these after reaching Fiji? Is it better to book in advance? Any recent experiences/advise with other island day trips would be appreciated. Also dinner/lunch cruises? Thanks!!