Ten years later... old thread but still the rock is sitting there.
Wanted to add my 2 cents worth in case you're ever in the area again and want to climb those gneiss cliffs. There is actually a lot of rock in the northern part of Okanogan county that is on public land (FS and BLM), but a couple of the places do have access issues.
The cliff east of Hwy. 97 just before Oroville is called Whistler Canyon, and it is now being promoted as a no-fee recreational access point to the West side of Mt Hull by the county (hunting, hiking, horse and mtn bike riding as well as climbing). There is a smooth dirt road going right to the base of the cliff (not well marked). There are now 31 established routes on this compact but varied crag, mostly bolted, ranging from 5.3 to 12+. There are also more developed areas to the West (along upper Toats Coulee), and south along 97 - the lower SW face of Mt Hull and Burge Mtn East of Tonasket. In short, lots of great climbing, some of it is written up on rockclimbing.com.
As for secret and restricted - there are areas that fit that description south of Tonasket and around Omak, but there is plenty of public rock for the rest of us to the North. The largest area of good rock (SW Face of Hull) has tremendous route potential from bouldering to 600' multipitch, but easy access is still an issue as private orchard land has to be crossed in some areas. There are public access areas, but they are not obvious or direct. But from mid April to October you have to be prepared to share it with the rattlers and mtn sheep.
For more info on Whistler Canyon stop by the Tonasket visitors center as you're driving through town.