Bear Hollow County Park is a decent little campground to spend a night if you're passing through Eastern Oregon for the fossil beds, painted hills or the just the dark skies. We stopped here on our way into Spray as we were running out of daylight hours and didn't know the roads well. It gets dark out here!
If you're looking for a destination campground you can do much better in Oregon - but Bear Hollow is adequate for a drive in!
There is an ADA accessible site. Water didn't appear to be potable and there isn't really anything nearby so you'll need your own supplies. 20$ a night - cash only.
Stayed here on a tour of the John Day Fossil Beds. Found a great site, but like the last reviewer felt it was overpriced for dry camping. Water was available if you could jockey your rig to access it. Sites also weren't level (at all) and were generally dirty. Could have used a good trash pick up. Pluses were that it was super quiet and big, private sites. Despite the price would highly recommend it.
This place was okay. Near Fossil, Oregon and on the way to the Painted Hills. Lots of trees and a slope/hill to run around on for the kids. Sites were a decent size. But overall the whole place seemed overgrown and full of weeds. If it was free, I would have rated it higher. But at $25 for any camping including tents, it was way overpriced.