Absolutely, traveling to Makassar, Bira, Bulukumba, and Selayar would be a wonderful experience. Here are some travel tips for your journey:

Best Time to Visit:
The best time to visit these Indonesian locations would be during the dry season, typically May to September.

Route and Accessibility:
You can start your journey from Hasanuddin International Airport at Makassar, the main transportation hub in South Sulawesi. You can get to Bira by road from Makassar, which would take around 4-5 hours. For Bulukumba, the journey from Makassar is approximately 2 hours and for Selayar, you would need to take a ferry from Bira.

Altitude and Acclimatization:
Unlike certain other Indonesian destinations, these locations are at sea level. So you don't need to worry about altitude sickness.

Accommodation and Booking:
There are plenty of resorts and homestays in Bira, Bulukumba, and Selayar. Booking in advance is highly recommended, especially during high-season periods.

Clothing and Essentials:
Pack light cotton clothing as the climate is generally warm. Don't forget your swimsuit and snorkeling gear, if you plan to explore the beautiful underwater world. A good sun-block, insect repellent, and comfortable footwear are also mandatory.

Health and Safety:
Ensure you're up-to-date with your routine vaccines. Also, taking out travel insurance would be a wise choice, for any unexpected situations.

Local Etiquette and Respect:
When visiting sacred sites and interacting with locals, please respect local traditions and regulations. Modest dressing would be appropriate in these situations.

Tip: Don't forget to try the delicious local cuisine, including Coto Makassar and Konro; they are must-tries in Makassar.

Make sure you enjoy the beautiful islands' sunset views in the evenings, and take plenty of photos as memories of your trip!