Sure! Visiting Góra Kalwaria, Warsaw, and Kraków in Poland is a remarkable journey. Here are some travel tips to help you in your tour:

Best Time to Visit:
The best time for traveling to these Polish cities is during Spring (April to June) and Autumn (September and October). During this period, the weather is pleasant.

Route and Accessibility:
You can start from Warsaw as there are multiple international airlines flying into Warsaw’s Chopin Airport. From Warsaw, Góra Kalwaria is about a 40-minute drive. Afterwards, you can either take a train or a bus to reach Kraków.

Altitude and Acclimatization:
These towns are located at low altitudes so you don't have to worry about acclimatization.

Accommodation and Booking:
There are multiple options for accommodations ranging from budget hostels to luxury hotels in all three locales. It is recommended to book your stay in advance to secure the best deal and avoid any last-minute inconvenience.

Clothing and Essentials:
The weather can be unpredictable in Poland, with showers occurring even in summer. Pack a mix of warm and cool clothing, along with a waterproof jacket and comfortable walking shoes.

Health and Safety:
Poland is a safe country with a good healthcare system. Still, carry a basic first aid kit and your necessary medications.

Local Etiquette and Respect:
Polish people are generally formal and respectful. Avoid loud and unruly behavior. When visiting religious places, dress modestly and maintain quietness.

Hope these tips are helpful to you, enjoy your travel to Poland!