I live on the Oregon coast, and hunt blacktails religiously. I spend 20+ days a year during the season hunting, and A LOT of time throughout the year scouting and looking for deer. IF you want to come to Oregon to hunt blacktails, be prepared to eat your tag.
your best chance will be in southern Oregon.
its an over the counter tag for everyone.
a 3 1/2 year old deer will NOT be 120" on the central coast, anyone who thinks that is delusional at best. ive seen 1, MAYBE 2 deer that break 120" in the last 15 years. and I pass up A LOT of deer searching for good buck.
what your wanting to shoot is a big bodied mature deer, and don't worry about inches of horn.
I saw and passes over 20 bucks a year for several years searching for a giant, they are just very few and far between.
now if you head to southern Oregon, that's another story.