Hello! It sounds like you have an exciting trip to Slovakia coming up. Here are some travel tips for your visit to Dolný Kubín, Oravský Podzámok, Zilina, and Rajecké Teplice.

Best Time to Visit:
The best time to visit these cities in Slovakia is from May to September when the weather is warm and conducive for outdoor activities. Fall (October to November) is beautiful too with vibrant autumnal colors, though it might be a bit chillier.

Route and Accessibility:
Bratislava, the capital city of Slovakia, is the major entry point for international flights. From there, you can reach Dolný Kubín by train or bus, both taking approximately 5 hours. Oravský Podzámok, Zilina, and Rajecké Teplice are well connected by road and rail with Dolný Kubín and with each other.

Accommodation and Booking:
Accommodation options range from hotels to guesthouses and vacation rentals. Online booking platforms like Booking.com, Agoda, and Airbnb are popular and convenient. Do book in advance, especially if you are visiting during the peak season (summer).

Clothing and Essentials:
In summer, light clothing is ideal along with a light jacket or sweater for evenings. If you're going to explore nature, bring comfortable shoes for walking or hiking. In fall, warmer clothes are necessary. Don't forget essentials like sunscreen, insect repellent, and a water bottle.

Health and Safety:
Slovakia is generally safe for tourists. Be alert and aware of your surroundings. It is recommended to have travel insurance covering medical expenses. If you have any allergies or medical conditions, be sure to carry necessary medicines and inform your travel companions about your condition.

Local Etiquette and Respect:
Slovaks are friendly and polite. Respect local customs and traditions. Remember to greet people before asking something. Tipping is customary in Slovakia, usually about 10% of the total bill.