I know that area well. Keep in mind that LE will be intentionally vague to prevent people from tampering with the crime scene. LE is also likely to describe locations based on the route that THEY took to get to the location via police cars, forensic trucks ect. You need to think of how someone who lives in the area, and likes to hunt and fish, and probably owns an ATV would think about the location and navigate to access the area. Think about wanting to access the area COVERTLY, probably at night, with minimal risk of interaction with anyone, especially LE.
I am dropping a Googlemap map pin for the intersection of the first major spur road after Turner Creek Road turns to gravel. Use the Measure Distance tool on Google Maps and you will find that this location is about 10 kilimeters as the crow flies from the Wolfe Lair on Phillips road.
Dropped pin
Near Unnamed Road, Yamhill, OR 97148
Google Maps
This spur road leads uphill and to the EAST from Turner Creek road. If you browse in Satellyte view, you will notice that this spur road branches out into a network of private logging roads and ATV trails that interconnect or come close to interconnecting with spur roads off of Mount Richmond road which is gravel. Take Mt Richmond Rd to Gerrish Valley road, which is gravel SE and you reach Pleasant Smith rd, Oak Hill rd, Bishop Scott rd, Lillac Hill rd and Russel Creek rd, that are all gravel except for a portion of Russell Creek. The powerline trail off of Russell Creek intersects with a trail from the end of Phillps road.
My theory is that MW brought Karissa and Billy to his house, either dead or alive (Based on the extensive search by LE with divers, I believe that he killed them in the Hopewell area leaving behind suffecient physical evidence to convince an ME that they were dead. The murder weapon for Karissa was a firearm which was no doubt in that backpack MW was carrying when he returned to Cascade Steel. This firearm was disposed of in the furnace at Cascade Steel.) MW then stopped at Cascade Steel briefly before taking the bodies to his home.
Sometime in the next few nights, MW loaded the bodies of KF and WF on his ATV then drove up Phillips road to take trails and gravel roads up into the Weherhouser Timber land between Mount Richmond Rd and Turner Creek Rd. MW then disposed of their bodies at this location.
IIRC, LE mentioned that the bodies were covered with a tarp. This was probably MW's attempt to get rid of the tarp that he had wrapped them in rather than hide the bodies. Given the statements by LE that Karissa had died from agun shot wound to the head, I suspect that MW expected that their bodies would not be recognizable as human to an untrained person.
Given this scenario, there would have been at least traces of blood everywhere that MW took KF and WF.