Eastern Oregon is mostly controlled hunts you'll have to save some points and put in for the draw. (few spike hunts OTC) Western Oregon has more elk and is OTC minus two draw units which are easier to draw.
Lots of people hunt Western Oregon rifle, it can be a mad house. Dont get discouraged, keep an open mind. I find new people every year that get the jump on me going into an area they have never seen before. Beginners luck is real with no expectations and a fresh set of eye that are not skewed by previous hunts or learned behavior (bad or good)
Lots of public and private timber lands, you need to know all the rules of every private timber land you plan to hunt. Some offer little info some you'll need a permit to access. Some allow you to hunt but there are a lot of rules with times you can be on their land.
In Oregon the average is 1 hunter kills an elk every 10 years. If you do the work, scout, avoid people, put the miles in, glass areas, be respectful to others you will have a good hunt.