Sure! Here are some travel tips for your visit to Mérida, San Cristóbal, and San Antonio Del Táchira in Venezuela:

Best Time to Visit:
The best time to visit Mérida, San Cristóbal, and San Antonio Del Táchira is from December to April as these are the driest months and perfect for outdoor activities.

Route and Accessibility:
All cities are well connected by road. You can either hire a car or take public buses to travel from one city to another.

Altitude and Acclimatization:
The cities you mentioned aren't too high on an altitude, but if you are planning on hiking in Mérida (which is famous for its high peaks), it's better to acclimatize first.

Accommodation and Booking:
These cities have a good range of accommodations to choose from. It is advisable to book your accommodation in advance, especially during the peak season (December - April).

Clothing and Essentials:
Light clothing is appropriate most of the year and a light sweater or jacket for evenings. However, if planning hikes or trips to mountains bring warm clothing and sturdy shoes. Also, don’t forget to pack sunblock, hats, and sunglasses to protect from the sun.

Health and Safety:
Keeping in view the current political scenario in the country, be aware of the safety measures issued by your embassy. Avoid crowded places and always keep your belongings with you. If you have specific dietary requirements or are on medication, it's better to carry it with you.

Local Etiquette and Respect:
Most people in these cities are Roman Catholic, so wearing respectable attire while visiting religious places is advisable. The local people are very friendly and welcoming to tourists, so interacting with them can provide a unique cultural experience.

I hope these tips help you have a well-planned and enjoyable trip!