Ryan from what i remember the cabins are fine, just the vans!
Ill prolly camp as its nice flat ground down the bottom and loo, showers and stuff are close enough by
There are few things in winter you wont wanna swim or go down the creek, so id aim for either sept or end of easter sort of time. It can get pretty cold out there so make sure to pack a good sleeping bag and some ugg boots!
EDIT: Wonder where i put the tent....