Waldheim is fantastic. The cabins are way better than basic (but far from luxurious).
There are electric heaters, an oven and a cooktop. The showers have hot water, and heaters. Amenities well cleaned daily.
Not much in the way of “lounge room”, just benches. We take folding camping chairs for lounging.
The beds are basic bunks so you need a sleeping bag. No doubles!
If the power goes out it will be less pleasant, although there is a box of emergency items (which we’ve never had to use).
Make sure your car battery and its remote key battery is charged as the cold will cause problems (ask me how I know!)
It could be a bit interesting if there was lots of snow or ice; we have never had that (but mostly been in autumn).
You are still a good 30 minutes walk from Dove Lake and its trail heads.
You can catch the shuttle bus back and forth, including to Dove Lake.
We caught it back to Snake Plains and walked the boardwalk back to Waldheim one day when my knee wouldn’t allow me to go up or down big hills.
It will be very dark at night, and the sun will set early, and the valley will get very cold very quickly. Have a head torch and appropriate clothes.
Not just wombats, but also quolls.