Hello! It's great to hear you're planning a trip to Curitiba, Gramado, and Blumenau. Here are some travel tips for an optimal experience.

Best Time to Visit:
These cities in southern Brazil have a subtropical highland climate. The best time to visit Curitiba and Blumenau is between March and May or September and November when the weather is pleasant. For Gramado, it's stunning year-round, but particularly charming during Christmas time with the 'Natal Luz' festival.

Route and Accessibility:
Curitiba has an international airport, offering good connectivity. From there, you can take a bus or rental car to reach Gramado and Blumenau, which takes about five and two hours, respectively. Ensure you have a planned itinerary for convenient travel.

Accommodation and Booking:
There's a wide range of accommodations to suit all budgets in these cities, from luxury hotels to budget guesthouses. Booking in advance is recommended, especially during the peak season and for Gramado's Christmas event to ensure availability.

Clothing and Essentials:
As the weather can vary, bring layers including a light jacket. Comfortable shoes are vital for city walks. Don't forget sunscreen, a hat, and insect repellent, as well as a power adapter for Brazilian sockets.

Health and Safety:
Ensure your routine vaccinations are up to date. Stick to bottled water. Carry your personal medication and a basic first-aid kit. While Brazil is generally safe, it's wise to stay vigilant against pickpocketing in crowded areas.

Local Etiquette and Respect:
Brazilians are warm and friendly. Handshakes are common and close friends hug. Be aware of noise levels as the culture values quietness. Swimwear outside the beach/pool areas can be frowned upon. Respect religious and cultural sensitivities.