Here's all the honest help I can give. We hunted there a few seasons and quit because of high hunter numbers, rude hunters, and declining elk numbers. We hunted out of the Moon Meadow area, south of Ukiah. Hike in east or west from there for a couple of miles to get away from folks and stay in the wilderness to stay away from ATVs (unless you're part of that group). We killed a few cows in there and saw a couple of bulls. If you're hunting the spike season it's a real zoo. Get there a few days early to get a camping spot. Bow season is not so bad. It is good country and there are elk. Let's just say that to get our elk out from where we found them was a day and a half effort. Buy a cougar tag. Most folks would agree that's one of the reasons the elk have declined in there. I'm on the fence about the predator/prey argument most of the time and I don't want to get off subject, but I'll have a tag from now on. In to the south of the John Day River is also good, although I don't really know where to tell you to go in there. Scout, explore, stay out from dark to dark, listen, smell, use your binoculars.
Above all, have fun and good luck,
Pete