Hello, it sounds like a great plan to visit the vibrant cities of Vietnam: Ho Chi Minh City, Cần Thơ, and Vung Tàu. Here are some travel tips for your trip.

Best Time to Visit:
The best time to visit Vietnam, particularly these cities, is during the dry season, from December to April. The weather is generally warm and humid with less rainfall during this period.

Route and Accessibility:
You can reach Ho Chi Minh City by flying directly into its international airport, Tan Son Nhat International Airport. From Ho Chi Minh City, direct buses or taxis can take you to Cần Thơ and Vung Tàu. Regular ferries are also available from Ho Chi Minh City to Vung Tàu.

Accommodation and Booking:
Vietnam offers a wide range of accommodations from budget guesthouses to high-end hotels. Booking platforms like Booking.com, Airbnb, and Agoda can be used to secure your stay well in advance due to high tourist inflow throughout the year.

Clothing and Essentials:
Bring light weight and breathable clothing as humidity can be high. Essentials include sunscreen, insect repellent, a hat/cap, a good pair of comfortable walking shoes, and a raincoat or umbrella for sudden showers.

Health and Safety:
Stick to bottled water, ensure your meals are cooked properly, and avoid street food if you have a sensitive stomach. Always keep a small first aid kit for minor injuries or sickness. Familiarize yourself with the locations of nearby hospitals in case of an emergency.

Local Etiquette and Respect:
Vietnamese people appreciate polite, calm behavior. Be respectful to local customs and traditions. In religious sites, dress conservatively and avoid pointing directly with your finger. Always ask for permission before clicking photographs of locals.