Hello! It sounds like a wonderful trip you're planning, spanning the cities of Cadca, Kysucké Nové Mesto, Ošcadnica, and Makov. Here are some helpful travel tips.

Best Time to Visit:
The best time to visit these areas in Slovakia can depend on the activities you are interested in. The summer months of June through September are usually great if you enjoy warm weather and outdoor activities. If you're a winter sports enthusiast, you'll find the ski resorts in full swing in the colder months, especially December to March.

Route and Accessibility:
The most common route to reach these cities is by landing at the M. R. Štefánik Airport in Bratislava, and then taking a train or bus to Cadca. From Cadca, the other cities can be easily reached via regional bus or taxi services. You can also rent a car for more flexibility.

Accommodation and Booking:
There are several accommodation options from hotels to guest houses and many of them you can book online via platforms such as Booking.com or Airbnb. Be sure to book in advance especially during peak tourist seasons.

Clothing and Essentials:
If you're visiting in the summer, bring light clothing but also a raincoat or umbrella as rain showers can occur. In winter, pack warm, layered clothing, sturdy boots, and winter accessories like gloves and scarves. Don't forget your sunblock, insect repellent, and a good pair of shades.

Health and Safety:
Whilst Slovakia is generally a safe country, it's always logical to have travel insurance covering health emergencies. Tap water is safe to drink and standard vaccinations should be up to date. Always respect local driving rules if you rent a car.

Local Etiquette and Respect:
Slovaks appreciate polite and peaceful behavior. Handshakes are common forms of greeting. Respect local traditions and if invited to a home, a small gift like chocolates or wine will be appreciated.