Holo Holo Charters ★★★—Port Allen is the point of departure for Holo Holo’s two gleaming catamarans. The 50-foot Leila, licensed for 45 passengers but limited to just 37, serves Holo Holo’s 5-hour, year-round Napali snorkel sails: They’re $159 adults and $119 children 6 to 12, including a continental breakfast and deli lunch, and post-snorkel beer and wine. The 65-foot Holo Holo power catamaran, the island’s largest, was built specifically to handle the channel crossing between Kauai and Niihau, where passengers snorkel in stunningly clear water after Napali sightseeing on 7-hour trips, also with two meals and post-snorkel libations ($215 adults, $149 children 6–12). The 3 1/2-hour Napali Sunset Tour ($129 adults, $109 children 5–12), also aboard the Holo Holo, offers heavy appetizers, cocktails, and, at sunset, a champagne toast. The 2-hour Aloha Sunset Sail ($85) aboard the Leila serves the same fare but heads south to Poipu. Holo Holo also runs Napali snorkel tours from ultra-convenient Hanalei on comfortable inflatable “rafts,” really speedboats with fiberglass hulls, twin motors, stadium seats, and a freshwater shower. The 4-hour trip, including drinks and lunch, costs $199 for ages 6 and older (younger not allowed).