If you do get placed at Carotel/Unigardens/other your best option is to complain about the unsuitability of the accom there (if shared rooms or 7km travel distances are an issue for you) and to apply directly to the college(s) you would prefer to live in. Last year, due to an admin stuff-up, my application got dealt with in mid-Jan when I got back to Australia instead of November when it was lodged. The complaint was enough to get a better off-campus offer than the initial one, and the e-mail to Burgmann led to them bypassing the uni accom service to offer a place without interview.
Also, whilst Burgmann is still heavily Arts/Law focused it is trying to diversify. This means that non-law students particularly ones studying specialist or advanced degrees now have improved odds.