Hello! That sounds like a lovely trip. Let's get you all set up with the best travel tips for Pattaya, Rayong, and Chanthaburi.

Best Time to Visit:
The best time to visit these Thai cities is from November to February during the cool and dry season. The weather is pleasant and suitable for all kinds of beach and outdoor activities. Avoid the rainy season from July to October as the area experiences heavy rainfall.

Route and Accessibility:
To reach Pattaya, you can take a flight to Bangkok and then a bus or taxi to Pattaya which is approximately 2 hours away. For Rayong and Chanthaburi, there are regular buses from Pattaya and Bangkok. You can also opt for private taxis or hire a car depending on your convenience.

Accommodation and Booking:
All three cities offer a range of accommodations to fit different budgets. It's recommended to book in advance during peak season, especially in Pattaya as it's a popular tourist destination. There are many online platforms like Booking.com and Airbnb where you can check ratings and reviews before booking.

Clothing and Essentials:
Pack light summer clothes, swimwear, sunscreen, and a hat. A light jacket or sweater might be useful for cooler evenings. Don't forget to carry essential travel documents, local currency, and a Thai power adapter.

Health and Safety:
Ensure you are up-to-date with routine vaccines before your trip. Additionally, be cautious with street food if your stomach is not accustomed to such varieties. And always remember to stay hydrated and use sunscreen. Don't forget travel insurance, it's a precaution worth having.

Local Etiquette and Respect:
Thai people greatly respect their monarchy and religion. Dress appropriately when visiting temples. It's customary to take off your shoes before entering Thai homes and some businesses. Address people with their titles as a sign of respect.