Another trip in Canyonrims in the fall. No words can do justice to how great this place is. This area is just amazing, you will see no one, you will be on amazing trails and see amazing vistas. The trails are a mix of jeep roads and abandoned mining exploration roads. I think a fat bike is best to avoid grinding away in the sand. Get a map and go for it.
Go for it! Let me know if you have questions.