this is a site for the trans america trail. A cross usa off-road route for dual purpose motorcycles. Perhaps some maps or routesheets could be integrated into someones epic journey...Its all of road, no hiway, few people...:http://www.transamtrail.com/ Like to do this someday just for the adventure..
You could just do a reverse route. Head to their ending point and then take off from there. Just a few more miles on a journey. Might be more fun that way. Haha.
the Faq's say the "roll charts are plotted east to west" ( its a paper tape giving distance and direction.though they may have regular topos too (?)