Year after year, more and more people board cruise ships in pursuit of a dream vacation. Cruise Lines International Association, an industry trade group, had projected in December that a record 32 million passengers would take a cruise in 2020. That, however, was before the coronavirus started playing havoc with travel plans around the world. Possible upside: Bookings and prices could fall as a result. So we reached out to nearly a dozen cruise industry experts for advice on how to have the best experience. From when and how to book to what to bring and what to leave home, here's what they had to say about making the most of a cruise vacation.