Take the entire crew to hospital because you cannot, apparently, be interviewed there while being attended to by the medical staff.
Do not talk about the accident to anyone at all, if possible.
Do not speculate on what "must've happened" to anyone, especially the media and police. Refer the media to your boss.
Insist on food and rest (especially if you're an impoverished GA pilot....
)
DO NOT interfere with cockpit settings after the event (especially the LG lever) as they have ways of knowing what really happened.
Alert the Aussie embassy (if overseas)
If being interviewed by the pigs, I mean the cops, insist on legal representation and describe the event but do not speculate on the causes.