unless u get a really REALLY clear day, as in the air is clear,
not foggy or watever, then u'll get a nice photo. otherwise there's
not much contrast in the pics.. which is wat u want. as for the
exposure, well u're gonna get slightly burnt skies if it's all
white and cloudy, if it's a nice blue and the sun is behind you
(for the 12 apostles part GOR that would be in the morning), then
u'd be able to shoot nice shots. or, u could go with the silhouette
look and do sunsets, the sun will be on the left of the stones, in
front of u.
if all fails (like the day i was there) there's always
photoshop!!
and those post card shots, they are ALL photoshopped... 
