While Koh Yao Yai offers a peaceful escape, it’s important to know that it remains relatively underdeveloped compared to nearby Phuket or Krabi. The island has limited infrastructure, so expect slower internet, fewer shopping options, and limited nightlife. This is part of its charm, but it also means you should bring essentials such as sunscreen, medications, and extra supplies. Also, while many accommodations accept credit cards, it’s advisable to have cash on hand. The island's pace of life is slower, so be ready for a laid-back experience free from modern distractions.

To get to Koh Yao Yai, you’ll first need to travel to either Phuket or Krabi, both of which have regular flights from Bangkok and other major cities. From Phuket, you can take a ferry or speedboat from the Bang Rong Pier. Ferries typically take around 30 to 40 minutes, while speedboats are faster but can be slightly pricier. From Krabi, boats depart from Ao Nang or Krabi Town, and the trip also takes about 30 minutes. Once you arrive, you can explore the island by rented scooter, bicycle, or local transport. It’s advisable to book boat tickets in advance during peak seasons.

The best time to visit Koh Yao Yai is during the dry season, from November to April. This period offers warm temperatures and clear skies, ideal for beach activities, boat trips, and outdoor adventures. The rainy season, which lasts from May to October, can bring heavy showers, making it less ideal for outdoor activities, though it’s also a quieter time to visit if you prefer a peaceful holiday. Always check the weather forecast before planning your trip, especially during the transition months, as the seas can sometimes be rough.

For those staying in nearby locations like Phuket or Krabi, Koh Yao Yai is an excellent destination for a day trip. Popular activities include island-hopping, snorkeling, and kayaking in the clear waters, or simply relaxing on its quiet beaches. You can also visit the local fishing villages, where you’ll get a glimpse into the traditional way of life. For a more adventurous day, consider a guided tour through the island’s interior, where you can explore its lush jungle and hidden waterfalls. Koh Yao Yai is small enough to experience a lot in a single day but offers plenty to return for.