Surely! Zarne?ti, Fagara? and Bra?ov are beautiful towns of Romania worth visiting. Here are some travel tips for your journey:

Best Time to Visit:
April to June and September to October are the ideal times to visit these towns as the weather is mild and pleasant. Ski enthusiasts can visit Bra?ov between December to February when the city turns into a winter sports hub.

Route and Accessibility:
The easiest route is to take a flight to Bucharest, the capital city of Romania, then take a train or a bus to these towns. Public transportation is well connected.

Altitude and Acclimatization:
Altitude won't be an issue, as Romanian cities aren't significantly high. Zarne?ti is 760 m, Brashov is 650 m, and Fagara? is 415 m above sea level. So you do not need to worry about altitude sickness.

Accommodation and Booking:
There is a good range of accommodation options - from budget hostels to luxury hotels. Make sure to book your accommodation in advance, especially during peak seasons.

Clothing and Essentials:
Weather can vary, so it is recommended to pack for layering. For winters, heavy jackets and gloves are necessary. For summers, lightweight clothes would be sufficient. Don't forget to pack comfortable footwear for walking around.

Health and Safety:
The towns are relatively safe. However, like in any place, it's wise to take the usual precautions against pickpockets in crowded areas.

Local Etiquette and Respect:
Romanians appreciate good manners. When meeting someone, a handshake is the most common form of greeting. Most of the residents of these towns are Christian Orthodox, so be respectful when visiting churches.

Remember, Romanian cuisine is a must-try. The variety and the flavor palette will definitely leave you asking for more. Enjoy your trip!