I've had all sorts of trouble finidng an apartment at Falls Creek for this years 3 peaks (I didn't start looking till Tuesday this week). It seems that with the December early entry discount, a lot of people have entered the event earlier this year compared with last year and have booked their accommodation at the same time they entered. Last year and the year before I had the pick of several different appartments in early February.
Its seems that there are no more apartments left, but you may be able to get a room in a lodge still. I know that Karelia Alpine Lodge (http://www.fallscreekkarelia.com.au/
) still has a couple of rooms left, as we were going to stay there until we found what seems to be the last available apartment.
You can also try Falls Creek Central reservations (http://www.fallscreek.com.au/CentralReservations
) which is where I found the apartment.