We have booked some accommodation in Cairns and we were given a nice little discount so we are happy to give everyone the contact we've made as he has quite a bit of accommodation available at very reasonable prices. Just contact us on the email.
In Darwin we will be based at The Darwin Free Spirit Resort but as stated at least Kathy plans on doing Kakadu for a couple of days.
In Broome we recommend Beaches of Broome as it is a very nice backpackers close to where we will be arriving and departing from. Cycle Across Oz is planning on a trip to Derby during that time.
In Perth the YMCA was very popular on the last trip and was apparently OK accommodation.
Melbourne has so much affordable accommodation and we are reluctant to suggest any in particular.
We hope this is of some assistance.