Hey bill,
I spoke to bolts recently and was going to be out of communication, i cant remember when that was so....I think this is why you cannot contact him. He is usually excellent at getting back.
I stayed with my family at cascade gardens apartments, I found it inexpensive and comfortable, and is around 100m from the conference.
http://www.cascadegardensapartments.com.au
And please attend: I want to pick your brain with sitech.