That's a great trip. I played those courses last year and they were fantastic.
My rank of courses:
#1 Moonah Legends course - a great design and a really fun day to be had
#2 Dunes - a great lay out, and the best clubhouse of the bunch, make sure to make time to have a pint and a meal here before or after your round.
#3 Moonah Open Course - a little tighter off the tee and will be in great shape
#4 St Andrews Beach - it is a Tom Doak design, and you will need to play it a couple times to enjoy it. It will be in great shape of course, with a few interesting holes. I played it twice and I still have no idea where to hit my drive on the hardest hole (#13).
https://standrewsbeachgolf.com.au/course-guide/
As an international traveler / player I'd make a request to get a tee time at the National. It is worth it.
https://nationalgolf.com.au/golf/vis...20home%20club.
As for wild life, you can get the odd tiger snake, they're more aquatic, so look out for that, but I still look for my ball a bit. Brown snakes are also around, you might see one during the day, but it would be super rare. I've lived in Australia for over 10yrs and never seen one. Hopefully you see some kangaroos and wallabies.
If you're on the peninsula, take the ferry to Phillip Island and see the penguin parade. It's pretty good.