Thanks for the Fair Warning. Death March, eh? I have scouted the lower end and have the brochure showing the access points (fisherman access). However, it never made it onto my Must Do list. You have covered most of the reasons. It is a logistic challenge - and I don't think my new trike will do the narrow gate openings. The MTB would.
My contact over at the TrailLink IS department wondered why I hadn't been sending in new (to them) trails, so --- why not? I tossed this one at them. It has been in my backlog file for some years. Might as well get it listed and a page set up. I don't think it will ever become a Destination Trail like the Trail of the Coeur d'Alenes or the Route of the Hiawatha.