We are taking our first Oceania cruise in December and are still learning the ropes so would love any advice. We have never been to any of the ports (Costa Maya, Harvest Caye, Roatan & Cozumel) and are looking for recommendations for excursions or great snorkel spots we can easily access on our own. We prefer smaller group or private excursions in quieter areas over large 'party barge' excursions. We would also consider sharing a private excursions if anyone is interested. Share your wisdom!!