Hello! I see you're planning a trip to Kraków, Warsaw, and Poznań in Poland. That's fantastic! Here are some travel tips for you.

Best Time to Visit:
The best time to visit these Polish cities is in the spring (April to June) or fall (September to October) when the weather is mild and the cities aren't too crowded. The summer can also be a great time too, especially if you intend to participate in cultural festivals.

Route and Accessibility:
Begin your journey in Kraków, reachable by Kraków's John Paul II International Airport. From Kraków, take a train or bus to Warsaw, and then onwards to Poznań. All cities have a great public transportation system including buses, trams, and taxis to help you get around easily.

Accommodation and Booking:
Each city offers a range of accommodations to suit all budgets. You can book your stay in advance through popular hotel booking websites. Consider staying near the city center for ease of transportation and proximity to major attractions.

Clothing and Essentials:
Pack clothing suitable for mild weather but also carry a warm jacket and umbrella for unpredictable weather changes. Don’t forget your European plug adapter, a good-quality camera to capture the stunning architecture, and a pair of comfortable shoes for walking.

Health and Safety:
Poland is generally safe for tourists, but it's always smart to stay alert and aware of your surroundings. Remember to have travel insurance in place. If you need medical help, dial 112 for emergency services.

Local Etiquette and Respect:
Polish people respect traditional etiquette. A handshake is a common form of greeting. When visiting churches or other religious sites, modest dress is expected. Polish people are also very punctual, so be on time if you have appointments.