I'm not sure what I should say about the Grampians. Every state in Australia has a tourist park. A national park that is very, very easy and civilised with cafes, accommodation and easily reached attractions. Every path is well made and sign posted with "nature walks" and signs to explain things. I'm not against this. There is money to be made out of day trippers and tourists and it helps pay the bills for the wilder national parks. And easy national parks are a great, safe way to get started with bush walking. My first real, overnight hike was to Sealers Cove in Wilsons Promontory National Park. A pretty and very safe and easy walk.
Victoria has two such parks. Wilsons Prom and The Grampians. But a walking a track where you are passing a tour bus group of a dozen or more tourists (in dress shoes) is not really my cup of tea. But even so, I still visit these parks occasionally because they are lovely. So here are some images of The Grampians National Park. You may notice that most of these photos were taken very early or very late. Otherwise they would have people in them!
If you ever do visit the Grampians I would encourage you to visit more than just the bit around Halls Gap. The western side of the park and the southern end are well worth a visit.