What would you recommend packing for this trip?
Situated to the south of Florida and the Bahamas, Cuba is a Caribbean country with a tropical climate, so pack for hot, humid weather. While Explore don't operate many trips in the rainy season, it may be practical to pack a rain jacket or poncho for wetter spells.
For this Cuba tour, I'd recommend packing hiking shoes or comfortable walking shoes. Some of the hikes are rocky, so you may want to consider walking poles, too.