In Australia there are a massive variety. At the easy/luxury end there are camping-parks where (as you describe) there are playgrounds, full washing facilities,

In Australia there are a massive variety. At the easy/luxury end there are camping-parks where (as you describe) there are playgrounds, full washing facilities, often an on-site shop and cafe, usually chalets available for hire, pitches for your RV, and preallocated tent-pitches. At the more basic end there are sites in the national parks where you put a fee in an envelope on your way into the park, then drive your 4x4 or hike to a really remote spot and set up semi-wild. There's usually some sort of toilet facility. I'm not aware of fully 'wild' camping here, and you'd want to pick your spot carefully because of the crocs and snakes. Not that they're fully absent from the marked places!