There is no reason to book any car rental directly with a rental company. I always use Crown Holiday Cars. They are a specialist Australian car rental agency where you will always get cheaper rates, many inclusions, excellent customer service and a person to negotiate any issues. Thank you Vanden. An agent has more clout with car rental companies than a one-off customer.
Check the rates with a car rental company first and then get a quote from Crown. You will be pleasantly surprised