Through June 27, The von Liebig Art Center in Naples, Fla., hosts “Princess Diana: Dresses of Inspiration,’’ an exhibit featuring shoes, gowns, handbags, and other royal memorabilia of the late Diana, Princess of Wales, including two dresses never before displayed in the United States. The Inn on Fifth, an 87-room boutique hotel in downtown Naples, offers three-night, four-day packages starting ...