Leon Pantenburg, of Survival Common Sense, who lives in Bend, Oregon, also recommended that I check out Silver Falls State Park, which he wrote about here. It's not far south of Portland and certainly looks worth the trip:
It would be nice to have a couple of weeks in Oregon to really get out into the backcountry, but this trip will be a short one. As I wrote in Bug Out: The Complete Plan for Escaping a Catastrophic Disaster Before It's Too Late [Paperback], Oregon has some truly spectacular big wilderness areas, particularly in parts of the Cascade Range and for example, the Eagle Cap Wilderness Area. But any short hike I can do near the coast or in the old-growth forests will be a welcome break from working behind a keyboard; and from the heat and humidity that has already arrived to mark the beginning of another sweltering Mississippi summer.
I'll have more about the interview and some photographs from the trip after I return.