I just got word from Dreamworld. It seems the BB House tours are starting to wind down now. The House is currently known to be open on these dates:
Mon 5 Jan - Fri 9 Jan: 12:30pm - 4:00pm
Mon 12 Jan - Tue 13 Jan: 12:30pm - 4:00pm
After that there is no official word on whether it will be open, closed, or... otherwise!
Looks like I miss out on saying goodbye.