I would also like to add that we don't mind doing 30ft dives if it means both divers and snorkellers can enjoy lots of marine life
There are a number of Molokini snorkel charters that also do shallow scuba. Trilogy is a quality operator, and there are others. Snorkeling at Molokini is something many think is a must do, except for many divers, who think diving at Molokini is a must do.