Hello traveler, it's delightful to hear about your upcoming trip to Kota Kinabalu, Langkawi, and Bukit Tinggi! Here are some crucial travel tips for your journey.

Best Time to Visit:
The best time to visit Kota Kinabalu, Langkawi, and Bukit Tinggi is generally between December to April when the weather is dry and pleasant. However, with a tropical climate, brief rains can be expected, so do check the weather forecasts before your travel dates.

Route and Accessibility:
You can first fly into Kuala Lumpur, Malaysia's international airport, then take domestic flights or ferries to Langkawi and Kota Kinabalu. From Kuala Lumpur to Bukit Tinggi, you can simply drive or hire local transport which takes approximately one hour.

Accommodation and Booking:
It's recommended to book accommodations well in advance, especially during the peak season. An array of options are available from luxury resorts to budget hotels across all these locations. Secure booking can be done through reputable online platforms or directly through the hotel websites.

Clothing and Essentials:
Pack light breathable clothes along with swimwear for the beach. Take a good sunscreen, bug repellant, a wide-brimmed hat, and sunglasses. For urban areas, modest clothing might be more suitable. Don’t forget comfortable walking shoes for exploring the cities and local markets. Opportunities to shop will be plenty, so ensure some empty space in your bags!

Health and Safety:
It's advisable to take any routine vaccinations before traveling. Use bottled water for drinking and brushing teeth. When savoring street food, make sure it's been prepared and served hygienically.

Local Etiquette and Respect:
Malaysia is a predominantly Muslim country, and so, certain respectful behaviors and dress codes in religious and culturally significant places are appreciated. Always ask for permission before clicking photos of locals.