Some of the Northern Marianas is a package-tour nightmare, but it's still got its charms - turquoise waters, white sands, fine diving, snorkelling and hiking. If you really want to get away from the packagers, though, you'll need to hop over to laid-back Tinian or rustic Rota.The best time to visit the Northern Marianas is during the dry months of December to March. That's also the high season, and prices will be higher. It may be wise to avoid going during traditional Japanese holiday seasons: from Christmas through the first week of January; Golden Week, the last week of April and the first week of May; and Obon (August). If you do go at one of these times, be sure to book well in advance and be prepared to stay in more obscure accommodations. It's also difficult to get flights during the Christmas season, as many far-flung islanders return home during the holidays.