We went on the half day snorkelling trip (for divers as well). Very easy to book, excellent value. A minivan collects you from your hotel or you can meet at the shop for a 7.30 start. 15 min drive to port then 40 mins on the boat to the sites. Light breakfast is mostly fruit which was nice. Equipment is provided & the staff are v helpful. The sites are beautiful with clear water, great visibility & plenty of life on the coral. A number of trips come to the same area but there is plenty of space to snorkel. Great lunch. Return trip is before the wind gets up. As someone who occasionally suffers sea sickness I had no problems at all. Highly recommended.