Sure, It's wonderful that you are exploring Brazil. Here are your travel tips for visiting Curitiba, Florianópolis, and Bento Gonçalves:

Best Time to Visit:
The best time to visit these places is in the summer season (December to March), when temperatures are pleasant and there's plenty of sunshine. If you're interested in wine, visit Bento Gonçalves in September for the grape harvest.

Route and Accessibility:
All three cities have good connectivity. Internal flights are available from Brazil's major cities to Curitiba and Florianópolis. Bento Gonçalves can be reached by bus or car from Florianópolis.

Altitude and Acclimatization:
These cities are not located at high altitudes, so acclimatization is not a concern.

Accommodation and Booking:
Booking in advance is always a good idea, particularly if you're travelling during the high season. There's a range of accommodation available from budget to luxury.

Clothing and Essentials:
Pack lightweight clothing for warm weather, but also bring a light sweater or jacket for cooler evenings. Don't forget sunblock, swimsuit and insect repellent. A good pair of walking shoes is also recommended for exploring the cities.

Health and Safety:
Brazil is generally safe, but use common sense like avoiding unlit areas late at night and watch your belongings in crowded places. It's also advisable to check whether you need any vaccinations before your trip.

Local Etiquette and Respect:
Brazilians are warm and friendly. Basic Portuguese phrases can go a long way. Dress code is casual, but more conservative wear is appreciated when visiting churches or religious sites. Also, Florianópolis is known for its sustainable practices, so be sure to respect local guidelines on waste disposal and recycling.