The blast zone has very draconian rules about where you can hike. Off trail gets you a $500 fine in the monument in an area they designate. That would be where I would look if you could legally. They pretty well left everything alone in that zone just to see what it did on its own. . Beyond that to the North is Weyerhaeuser private forest, and down timber there was salvaged, replanted, and it this point in time getting pretty tall. You can bet the lumber company did not find anything that might stop its timber harvesting in the future. One of these days I would like to get Weyerhaueser guy in a bar, buy him some drinks and see what he has seen in their private forests.