Sure, I'd be delighted to assist you in your travel planning to Phuket, Krabi, Trang, and Satun. Here are some travel tips:

Best Time to Visit:
The best time to visit Phuket, Krabi, Trang, and Satun in Thailand is between November and April when the weather is mostly dry and the sea is calm. Avoid the monsoon season from May to October as heavy rain may disrupt sightseeing and other activities.

Route and Accessibility:
Phuket is accessible by plane from many major international airports. From Phuket, you can travel to Krabi, Trang, and Satun by bus, ferry, or a combination of both. Domestic flights between these destinations are also viable options.

Accommodation and Booking:
These destinations offer a wide range of accommodations that suit all types of travelers. It's recommended to book in advance during peak season. You can book hotels or resorts online through trusted platforms like Booking.com or Airbnb.

Clothing and Essentials:
Pack lightweight, breathable clothing, swimwear, sunscreen, a good pair of walking shoes, hats, sunglasses, and insect repellent. Don't forget your camera and an adapter plug for your electronics.

Health and Safety:
Drink bottled water to avoid any stomach issues. Applying a good-quality mosquito repellent is recommended, especially in the evenings. Always keep an eye on your personal belongings and respect the local wildlife, particularly the monkeys.

Local Etiquette and Respect:
Thai people are known for their respect towards elders and women, so make sure to follow suit. 'Wai', a traditional Thai greeting, is widely appreciated. Also, it's important to dress modestly when visiting temples and other religious sites.