Lanta is a high season/low season place Bob, or whichever Forum nic you want to go by.
Now, yes, quiet, winds blowing onshore, lots of blown in trash on the beaches. You want to be helpful, go pick up some trash.
High season, December-May, Lanta is great. Off shore winds white sand, green water heaven, pubs with bands at night. Saladan town seafood, epic.