Hello there! That's an exciting plan you have there. Traveling to Singapore, specifically Kam Wak Hassan, Ama Keng, Boon Lay, and Ulu Bedok, is a great choice. Here are some tips for your journey.

Best Time to Visit:
Singapore is blessed with a tropical rainforest climate which means it's generally hot and humid all year round. However, the best time to visit would be between February and April, these are the driest months with lower humidity. Avoid the months of November to January as they are the wettest due to the monsoon.

Route and Accessibility:
Singapore has a well-established transport system. From Changi airport, take the MRT or a taxi to reach these places. Local buses are also available for commuting. For shorter distances, you can even hire a bicycle.

Accommodation and Booking:
Accommodation options are abundant in Singapore, ranging from luxury hotels to budget-friendly guesthouses. It's recommended to book in advance through hotel booking sites for the best deals. Airbnb is also popular in the country with quite a number of listings available.

Clothing and Essentials:
As Singapore is hot and humid, pack light breathable clothes, comfy shoes for walking, a hat, sunscreen, and sunglasses. Don't forget to carry an umbrella or raincoat because rain can be unpredictable.

Health and Safety:
Singapore is known for its cleanliness and safety. Tap water is safe to drink. For health services, there are numerous clinics and hospitals available. However, it's always good to have travel insurance that covers health issues.

Local Etiquette and Respect:
Singaporeans are generally courteous and respectful. Keep in mind the country has strict laws - particularly relating to cleanliness, so avoid littering. English is widely spoken, so communication should not be a problem.