Tuyen,
I lived in Humboldt County in northern california for 5 years. It's just south of Oregon, but in California. Prime Darlingtonia country. It's probably the closest to where we live.
There IS no address - you would have to go at least half an hour off the most remote trails, which is very destructive to the habitat. I believe I saw some once on an official class mycology field trip, but we had to stay on the game trail.
I hope you have a lot of money for a plane ticket (I went there this weekend). You have to fly to SFO ($100-$200) and there are approximately 3 flights per day to the Arcata area ($150-$400). You can also drive there, but it's approx. 700 miles to Arcata/Eureka, then you will have to drive north into the forests between Trinidad and Oregon itself - another 30-60 miles.
So, please enjoy the plants you have at home, most of the habitats that CPs grow in would be destroyed or poached if anyone knew where they were.