Hi Dave ... we are planning a NPH tour late this summer to celebrate the NP centennial. Last summer we documented the trip taken by Edsel Ford in 1915 from Detroit to SF by way of mostly the National Old Trails Road. The trip was completed in a 1915 Ford Model T just as it was in 1915. We would like to complete the trail of Frank Guilbert or at least part of it (we don't have the 30+ days necessary for proper documentation of the entire route from Chicago. We plan to depart at Yellowstone with terminus in Tacoma. I can be reached at 240-401-4956 or mgessler@historicvehicle.com. Hope to hear from you. Thank you for all the work uncovering this historic route. Best, Mark