There are a number of access roads in the national forest, including a two track that follows a portion of the ROW in the canyon. Those roads were clearly impassable due to snow during the Lerro Charter. Also, during the rainy season some may be impassable unless you have a 4WD vehicle with mud tires! There is a sign on one of the forest service roads that says "The Williams Wrecker will not go beyond this point!"
Also, as John pointed out, you don't get smoke unless you pay for it! ;-)
Michael Allen