Hi MrDK.Not exactly what you were asking but I was at Mermaid Divers yesterday inquiring about dive trips and I also asked about snorkeling.1000 baht per person for snorkeling trips to the far islands which has much better diving than Koh Larn.(takes about a half hour by Mermaid speedboat.Leaves at 9:30 am)
Not sure if they spend some time on a beach,but for quality snorkeling this is a good bet.
Hope to meet you in Patts
