Hamelin Pool is roughly 20 km off the main road junction, close to the stromatolites which are in walking distance from the camp. I stayed in an 8 bed dorm but was lucky as I was the only one in there. The beds are good - I slept well. All 'rooms' appear to be retired construction office containers, but they do their job. They are air-conditioned as well which was good, but I must say I didn't really need it as the area gets cool over night (was there over Christmas).
The camp has no drinkable water and you get a 10 l jerry can of drinking water on arrival, and toilets/showers/pol use saline ground water. Washroom facilities are a bit end-of-life and need a renovation - I must say they still do their job well and are clean, but don't really look that way due to their pre-loved state (maybe it is also the saline water taking its toll on the facilities).
I don't want to stress these negatives - this is a remote area, and running the camp as it is is likely hard enough for the manager and staff. If your expectations are a five star city hotel - this is not it. However if you embrace the WA remoteness, definitely a place to stay here. Don't forget to order a milkshake from the cafe! The other food at the cafe is good, but also just don't expect something fancy - can't stress this enough - this is not a city five star resort but a mostly owner operated outback camp! Also worth mentioning, prices at the cafe are reasonable despite this being the only cafe for miles in the area.