Absolutely! A trip to Hue, Da Nang and Hoi An in Vietnam is a visually enthralling experience. Here are some travel tips for your journey:

Best Time to Visit:
Generally, February to May is the best time to visit Hue, Da Nang and Hoi An as the weather is warm and sunny.

Route and Accessibility:
The most convenient way to get around these cities is by car or motorbike rentals. Trains and buses are also available for inter-city transfers. From Da Nang, you can take a taxi or local Bus to get to Hoi An.

Altitude and Acclimatization:
These cities are at sea level, so altitude acclimatization is not an issue.

Accommodation and Booking:
There is a range of accommodation options from budget hostels to luxury hotels. Booking in advance is highly recommended, especially during peak season.

Clothing and Essentials:
Bring lightweight clothing due to the tropical climate. However, a raincoat or umbrella could be useful as sudden showers can happen. Sunscreen, hats, and sunglasses are also essential.

Health and Safety:
Ensure that you are up-to-date on routine vaccines before your trip. It's also wise to have travel insurance that covers medical evacuation. Drink bottled water and be cautious of street food.

Local Etiquette and Respect:
While visiting religious sites, dress modestly and respect local customs. It's customary to remove shoes before entering someone’s home or a pagoda. Also remember, bargaining is quite common in Vietnam's markets.