I wouldn’t say Jackson or Josephine county “want” to join Idaho. There has not really been political talk or any votes for such a thing. The counties that want to join Idaho are east of Jackson county and have much smaller population. Anecdotally, everyone I know in both counties are proud Oregonians and would never vote for such a thing, even if they do hate Portland. The anti-tax sentiment is a separate issue all together.
Wow this is a fantastic and artistic picture, bravo!