Millions flock to Thailand each year, but you can still find quiet, unspoilt beaches on which to do absolutely nothing, as Laura Barton discovers, while Gemma Bowes finds an island escape in the heart of touristy Phang Nga

It's not that I don't like other people – indeed I would go so far as to lay claim to a rich and varied social life. It's just that, as I have grown older, I have found that I increasingly like spending holidays in a place where I can guarantee that I won't have to talk to anyone. Not splendid isolation exactly, no far-flung mountain huts or Buddhist retreats, rather something we might class as "minimal interaction": no small-talk by the pool, late-night karaoke or group safari outings, thank you very much.

For this, I blame the holidays of my childhood: invariably two weeks in a remote cottage in Anglesey. There were long walks, damsons to pick, fields of cows and sheep to admire and occasional trips to the beach but, crucially, also plenty of time to read, eat, sleep and row about in the creek at the bottom of the garden. I would holiday there still, were it not for the flat grey skies and the viciously cold Irish Sea. For the past few years I have been trying to find somewhere that, while warmer than north Wales in August, is still just as quiet and still and lovely.

And so it may puzzle you to learn that I recently took a holiday to Thailand. Some 14 million people flock here each year, drawn by the natural beauty and myriad delights: elephant rides and jungle adventures, temples, beaches, romantic idylls and, of course, phenomenal food. As I stood on the streets of Bangkok, breathing in the canteen smells and the diesel smoke, listening to the calls of the market vendors selling everything from Viagra to coconut water, and wind-up toy dogs to neatly-threaded garlands of flowers, I began to fear that visiting Thailand to escape the world might have been a giant mistake.

But Bangkok was not my ultimate destination. Two hundred miles east of this giddying street, near the Cambodian border, lies the small island of Koh Kood, home to rainforest, coconut and rubber plantations, sleepy fishing villages, and fewer than 2,000 people.

Koh Kood's great advantage is its relative remoteness. Getting there requires an internal flight or train journey from Bangkok, followed by an hour's boat ride from the mainland. This sounds more of an expedition than it actually is. It's about an hour from Bangkok to the small airport at Trat, with its manicured lawns and string of topiary elephants along the runway. The car ride to the ferry port took me through lush green countryside, past villages and temples and fruit stalls. And there are, I thought to myself as I watched the land disappear and the surf ride up behind our speedboat, surely worse ways to spend an hour than sailing the clear blue waters of the Gulf of Thailand, especially if you care to use the time for a bit of dolphin-spotting.

Accommodation on Koh Kood is varied. There are homestays and budget hotels, as well as a handful of luxury resorts, but even these promote a barefoot, relaxed approach. There are no landlines, little internet access, and few cars. Electricity is minimal – homes and hotels rely on generators or solar power. All is slow, warm tranquillity.

I disembarked at the jetty of Away, a quietly luxurious resort with a cluster of bungalows overlooking a bay. There's plenty of warm and graceful hospitality here, as well as a spa and one of Koh Kood's best diving centres, but no one jostles you into a hike or a snorkelling excursion.

Mostly this makes for a fine place to do nothing; slow and calm and unruffled, you can feel Koh Kood subtly working its way into your bones. On an average day here I did little beyond loll about in the hammocks and deckchairs along the boardwalk, beneath the palm trees, and strategically positioned on the jetty to take in the sunset. I took a kayak across the clear blue sea to a small golden curve of beach; I took a quiet boat ride over to it the next bay. I swam, I slept, I read some Per Petterson, and amid the cool rooms and quiet corners, I felt my mind gently unwinding.

Most evenings, when the sun was low but the air was still heavy and damp, I strolled into the nearby village, for dinner or a beer. The road is a dusty strip, tan-coloured and warm underfoot, and at night the jungle grows inky black, full of twitching, chirruping, wild sounds – the calls of birds and frogs and monkeys. The restaurants here are simple but fantastic, and after even a short walk through the thick evening air you are pleased to find a cold bottle of Chang beer and a bowl of yellow curry.

A short jeep drive from Away, Shantaa is an undeniable step up in luxury. The 10 private villas sit on a hillside, amid lush gardens, with a simple stylish bedroom, a balcony and an open-air bathroom, home to exotic flowers, passing geckos and, to my great excitement, even the occasional iguana. There is a village nearby where you could venture for dinner, but it would be hard to leave the resort's restaurant. Family-owned and staffed by students, it is one of the island's best. The menu offers traditional Thai dishes plus some twists, such as raw sea bass salad with peanut sauce, and mango parfait with coconut ice cream.

I can think of few places I have enjoyed staying more. Flinging open the doors of my villa to lie in bed and watch the sun rise over the palms each morning, I would cross over the wooden pier to walk along the long stretch of soft, pale sand. Afternoons would be spent swimming in the warm turquoise sea, sipping limeade at the beachside cafe, and taking an open-air Thai massage, all feet and breath and tiger balm, to the sound of birdsong and the steady hush of the waves.

For a treat I spent my last night at Soneva Kiri, which was a bit of a trip from the sublime to the ridiculous. Imagine an uber-swanky Center Parcs, an enclosed resort amid acres of forest and organic vegetable gardens, where guests fly in by private plane, and spend their days in a kind of ludicrous Hollywood luxury; where you have your own personal valet, and everyone hums about on golf buggies and retro bicycles, shuttling between the spa and the library and the giant inflatable cinema screen (available for private hire, should the mood strike you).

I can think of few places less like the remote Welsh cottage of my childhood holidays, and even if you can't afford to stay there, the resort's Benz's restaurant is worth seeking out, for an exquisite, Thai feast, from leaf-wrapped mieng kam to sweet tapioca in coconut milk and perfectly ripe mango and dragonfruit, served as you watch the sun dip below the water and the fireflies begin to blink.

Later, as I took a midnight swim beneath a clear sky and a full moon, I thought how finally, after all this time, I had found an island every bit as quiet and still and lovely as a rainy Anglesey in August.

• Thailand
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