SalmonStryker - You may be right about blacktail deer becoming more reclusive due to hunting pressure but in my area, deer numbers seem to be down due to a triple whammy: cougars, clearcuts (fewer of 'em), and cooties (hairloss syndrome). I live in the coast range foothills and believe there are perhaps half as many deer as there were 8-10 years ago - and I live adjacent to a 200-acre timbered basin that isn't hunted (a private refuge).
Cougar numbers are way up and they take a lot of deer.
Clearcuts are way down. Clearcuts offer prime forage for deer for about 10 years then decline in usefulness as the new forest grows and crowds out the forage plants. Logging declined about 10 yrs ago. Thinning opens up older stands a little but if done right, there isn't really very much additional forage on the ground for deer.
Parasite-caused hairloss syndrome has been affecting the local deer for at least 3 years. Every winter when we have 3" or 4" of snow after a few days of rain I find one or more dead deer that just layed down, got covered with snow, and died. Probably half of the few deer I still see have shaggy coats from the syndrome.
Having said all that, I bought a westside tag and intend to hunt later in the season - and hope to fill my tag.