Sure, the three Slovak villages Podbiel, Brhlovce, and Brezová Pod Bradlom are unique and rich in cultural heritage. Here are some travel tips for your journey:

Best Time to Visit:
The best time to visit Slovakia is from May to September when the weather is warm and mostly dry.

Route and Accessibility:
Podbiel and Brezová Pod Bradlom are both located in western Slovakia, spaciousness for a car journey. Brhlovce, on the other hand, is situated in the central part of the country. So, you might want to plan your route accordingly.

Altitude and Acclimatization:
These villages are located on lower altitudes, so altitude sickness is not an issue. However, if you're planning some hiking in nearby mountains, remember to acclimatize.

Accommodation and Booking:
Book your accommodations in advance. While there may not be many hotels in these smaller towns, you can find several guest houses and holiday homes. Airbnb is also a good option.

Clothing and Essentials:
Pack light summer clothing for daytime but also bring some warm clothing because it can get a bit cooler in the evenings. Don't forget comfy footwear if you plan to do some hiking.

Health and Safety:
The tap water is usually safe to drink in Slovakia. For health and safety measures, have your regular medication with you and a basic first aid kit wouldn't hurt as well.

Local Etiquette and Respect:
Slovaks are friendly and hospitable. As a visitor, remember to respect their local customs and traditions. Punctuality is appreciated, so make sure to be on time if you have made any arrangements. Reservation is recommended in restaurants. Try to learn a few basic Slovak phrases - locals appreciate the effort!

Enjoy your journey exploring the rich cultural heritage, relaxing countryside and the beautiful landscapes of the area.