OK, The spot I found in Spray sounds pretty decent, especially with the house rental (3 bedrooms 2 bath/$135 night) and also RV and tent space on site. The real issue is there is one store and cafe and they close @ 6pm sharp. There is also fuel there but likely just regular. It is suggested to bring your groceries from a larger town on the way in. You can see the River Bend motel here: http://riverbendmotel.com/
For the Sumpter ride: about 280 miles It's pretty remote from Ukiah to Sumpter.
Spray, east to Long Creek, North to Ukiah (90 miles) SE on NF-52/NFD-73 to Sumpter (65 miles). Sumpter Hwy 7 to Austin, 26 to John Day, Dayville, up Hwy 19 and return to Spray (126 miles).
Another Loop, 202 miles, Spray South on 19 through the John Day Fossil beds West on 26 to Mitchell (62 miles), up 207/19 through Fossil to Condon (63 miles), 206 to Ruggs Junction and down 207 and back to Spray (76 miles).
There are many places to visit and the scenery is pretty incredible.
There are other possibilities for lodging closer to or in John Day or nearby, including VRBO places, so there are other options.
Thoughts? Mike, I know you have ridden around this area a bit....