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Best answer
9
Koh Tao via Surat Lomprayah catamaran 900–1100 baht 2hr Donsak worth extra seasick prone — night ferry 6hr plus rough budget suffering. Book combo city bus transfer Donsak not direct boat downtown. Raja Seatran Samui Phangan only Tao Lomprayah Songserm. Skip Songserm queasy. Train late overnight buffer catamaran morning.
6
Catamaran from Donsak — faster, worth extra if seasick. Night ferry 6+ hours suffering.