Bathrooms are the best part
This place has a great shower and bathroom facility, but can be a bit confusing to find it first. You basically just pull off the side of the main road onto a dirt path, there's a very small sign indicating Willow Creek camping. There is no check in or out process, you literally just pull up to the site you rented and set up.
There are 2 toilets and 2 shower rooms, as well as a community sink for dishwashing. If this place was fully booked it would likely be difficult to share the facilities with a lot of other campers. The sites themselves are close quarters so don't expect a quiet peaceful experience if you have neighbors!
We booked the site with the shade cover which was a good call. This place just bakes in the dessert heat, high wind gusts make it difficult to set up and persisted into the night making it hard to sleep. Also, this is near a town so you will not be able to see the Milky Way and stars as well as being in big bend park itself, so if your purpose for camping in this area is stargazing, maybe find a different more rural site.
All in all, this campground has nice bathroom facilities and is close enough to civilization that you will be able to get cell reception. The gas station down the road is pretty sad, they don't have ice or water and most everything is "out of order", do not rely on anything but yourself and what you bring. Gas is also very expensive, fill up in Albine or whatever town you come to before you get close to this area.