I moved to Oregon 10 years ago from PA, where I had lived for 20+years. I grew up in So Calif. My take on the culture and politics is that the situation is similar to that in other states. Specifically, the rural areas are more conservative, sometimes markedly so, and the large cities are liberal. In Oregon that means the Portland area, Salem area, Eugene to a degree, and some other towns, notably Ashland. Brookings is trending that way while Gold Beach, 30 miles to the north is relatively conservative. Basically, Southern Oregon, south of Eugene is on the whole fairly conservative. Eastern Oregon, more or less defined as east of Interstate 5 is conservative except further north, where you need to go further east for this dynamic.
Unfortunately it is true that the political system has been hijacked by the left, as described by the previous poster. Right now they are really working on diminishing of firearm rights. There is significant pushback however, and a strong movement by many counties to secede from the state and join Idaho. My expectation is that imminent social and economic crises (e.g., demise of the dollar as world reserve currency, introduction of CBDCs, and other issues) will force many leftists to wake up or starve. So I don't worry about it and just keep working on my preps and networking.
As far as people minding their own business, I have found that nosiness and related behavior transcends political affiliations, though I do agree that liberals as a class seem to feel more entitled than others to interfere with others' lives.
As for rainwater catchment, rooftop catchment is TOTALLY legal. I don't know where the misconception that it is not came from. Here is one of many websites that confirm this.
https://worldwaterreserve.com/is-it-illegal-to-collect-rainwater/ Where I live we get so much winter rain that capturing even a portion of the rain falling on the roof easily amounts to over 10,000 gallons.