Skomakawa area. About a 90 minute drive to Portland. There seem to be plenty around. I found the remains of a dead one a couple of months ago that some predator killed.
I've only seen one porcupine live - just before first light, so I could hardly see him. A bunch of rustling in the low bushes on the road I was walking down had me freaked out for about three minutes. Out pops porky - he walked right up to me so I gave him a fake kick at his face - I didn't want to burn a broadhead on him. He decided to change directions and just waddled back to his spot in the bushes.