Originally Posted by op487062

Some of your trip sounds like my itinerary a few years ago: 4 nights Lizard Island (Beachfront Suite), 4 nights Wolgan Valley, 4 nights PH Sydney (King Bed w/Opera View Deluxe).
I had considered visiting the west coast of Australia but reconsidered after realizing Australia is about the size of the US.

Lizard Island: I'm not a scuba diver so I missed out on Code Hole, but the resort offers motorized dinghies to take to different beaches for swimming/snorkeling.
The food was good but nothing memorable. I think the employees said there are more staff than guests but dining service was a bit slow/inattentive at times. I think the resort is a little too expensive for what it offers.

Wolgan Valley: Drive took about 4 hours from SYD. I preferred the food at O&O over Lizard Island. I like the location, it reminded me of the Grand Canyon.
There are hundreds, if not thousands, of kangaroos milling about the grounds and the occasional wombat--it was a little disappointing there wasn't a greater variety of animals.
As someone else mentioned, most people seemed to be staying there for 2 nights--which I'd probably suggest as well.

PH Sydney: Good hotel but overpriced. Sydney is like a lot of urban, Western cities that you're probably not missing much if you trim the number of days you stay there.

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If you're going to Australia for a different experience than you'd find in the US, I'd go with the _fx recommendation and visit islands/wilderness