Skip the expensive speedboat tours and take the late ferry to Koh Yao Noi from Tha Thien Pier. Leaves around 10 PM, takes 3 hours, costs 150 THB. You arrive around 1am when everything's quiet.

The boat is basic but comfortable enough for the journey. Mostly locals commuting home with some backpackers. Bring snacks and water since there's no food service. Sleep on deck under the stars if weather's good.

Not for everyone but the night crossing has this mysterious vibe. Island looks completely different when you arrive in darkness versus daylight tours.