This luxurious five-villa Tadrai Island Resort (managed by Hilton) has a stunning natural location in the Mamanucas Islands — 15 miles off of Fiji’s mainland. Opened in 2014, the adult-only hotel attracts honeymooners and couples with big budgets who want a quiet, personalized stay. Rates include memorable meals and beverages at the stylish restaurant and bar, where guests will be taken care of by a small but doting staff. Villas are well-equipped with minibars, iPads, and plunge pools, …