In order to get to Byron Bay, you can jump on a Greyhound Coach. Leaving at least twice a day daily, you can get to this wicked little place from across the country. Tours can offer great alternatives for accessing the sites alone, but does not always give you the flexibility to make changes to your schedule. 

Within Byron itself there are bikes you can rent for the day to mooch around the place. However, this area is easily accessible and walkable around the town centre. 

If you want to venture further out, the best option is to rent a car with others to make the most of your experiences out there. If you fancy your own little road trip, why not rent a campervan? Especially if you are travelling with friends, (i.e. where you can split the cost), a campervan gives you flexibility to drive from place to place as and when you want! It’s important to bare in mind that (1) Australia is big, like, really big. Expect your drives from city to city to be at least 5 hours. (2) Driving might interfer with you wanting to drink (3) You have to pay for fuel aswell, so make sure you count it in the cost when you are budgeting.