Definitely, here are some travel tips for your trip to Sydney, Bowral, Kangaroo Valley, and Wollongong.

Best Time to Visit:
The best times to visit Sydney and its surrounding areas are from September to November and from March to May. These months usher in pleasant temperatures, moderate tourist crowds and reasonable rates.

Route and Accessibility:
All these places are easily accessible by road from Sydney. Bowral is approximately 80 miles southwest of Sydney. From Bowral, Kangaroo Valley is just a short drive south, and Wollongong is about 40 miles southeast along the Princes Highway.

Altitude and Acclimatization:
These locations are at sea level, so there's no need to worry about altitude sickness or acclimatization.

Accommodation and Booking:
Sydney, Bowral, Kangaroo Valley, and Wollongong have a wide range of accommodations to choose from. From luxury hotels to budget inns, you can find what you need based on your budget. Booking in advance is always recommended to secure the best rates.

Clothing and Essentials:
During the recommended times to visit, the weather is generally pleasant but can be unpredictable, so it's good to pack a range of clothing. Do pack plenty of sunblock, swimsuits if you plan to hit the beach, and a good pair of walking shoes.

Health and Safety:
Sydney is a safe city, but like any major city, it's always wise to stay vigilant, especially during night time or when visiting crowded places. Carry a basic first aid kit with you for emergencies.

Local Etiquette and Respect:
Australians are known for their laid-back and friendly demeanor. Treat locals with respect and follow the cultural norms expected in public places. Be environmentally responsible and follow all local laws and regulations.