The White River BLM Campground is north of Maupin along the Deschuted River BLM access road. I think there's about 5 sites. These sites are all located along the Deschutes, between Maupin and the 216 highway. I think the sites were $16/night.
The sites are pretty basic, with vault toilets and no running water. There is a picnic table and fire ring at each site. The highlight is the amazing river access and views. Fishing and rafting are the main activities here.
I loved the sound of the Deschutes as you fall asleep.
We stayed in an 18 foot trailer. The sites are a little tight for ginormous 36 foot trailers with multiple slideouts. We fit just fine. This place is by the river with some shade trees. No highway noise but the train tracks are across the river. You may have to park your tow vehicle in the overflow lot across the street. There's rafting and fishing. The rv spots have power, water and sewer.