For whatever reason I always thought of William O’brien as more of a day trip park, but it actually has really nice campgrounds! There is the Riverway campground, which is more shaded and conveniently located next to the river trail(not paved, but flat and lots of people with strollers). I would avoid booking at this site if it has been a wet season, on a previous day visit the river trail was completely underwater so I’m assuming that several sites were as well.

If you book at the savanna campground you don’t have to worry so much about an overflowing river! This is also where the small rentable cabins are, and staying in one of them is definitely something I am interested in doing. This is also the campground that seemed to have an overwhelming amount of jumbo RVs since the pull-ins are pretty straight- especially the 79-96 loop. So be aware of that if you are a tent camper looking for peace and quiet and not generators. The last two loops are definitely the nicest as far as tent site quality- they are also non-electric so you don’t need to worry about RV noise.

I can’t speak on the bathrooms since the campground has portapotties set up. 

Great sites at Riverway: 1, 5, 9, 13, 47, 49, 50, 53, 59 

Great sites at Savanna: 82, 108, 114, 117, 118, 123, 125,