I've been at it 30 years hunting Blacktails and Roosevelts here in Oregon. I still feel like a novice every time I go out. I can't emphasize enough how tough they are to hunt. You can't pattern them since big blacktails go almost completely nocturnal in rifle season. I run a dozen game cams on our property that has virtually no hunting pressure and it is still very tough. It actually pains me for an out-of-stater to make and investment and think they will have even a remote chance of a quality hunt. If I could do anything to talk you out of it I would. If you absolutely have to do it, book a private land guided hunt.
On the flip side we are running probably 90% on out of state hunts (NV, AZ, CO, MT, UT, WY), DIY in units we have never hunted before.
There is a good reason I've learned to play the application game out of state.