The conference venue, Double Tree by Hilton, is offering a limited number of King Guestrooms with single or double occupancy rates of AUD $199 per night.
To book, follow this link.
If you wish to explore other accommodation options, there are multiple choices in Cairns, from budget to 5 Star.
Cairns Tourist Information Centre staff are happy for you to email them for assistance:
They advise that they use a range of wholesale accommodation sites not generally available to the public and will always try to offer competitive rates.
Even better, they say that if you state that you are part of the conference they will apply discounts if you do choose to use them for local accommodation and/or tours.
There are also Air BNB options which mostly operate independently, so if you would like to explore this type of accommodation, go direct to Air BNB or Stayz (Remember to check the distance to the conference venue to ensure you don’t end up spending more on taxis, Ubers or car rentals than you may save on accommodation).