Plan updated. I've copied over two tracks from the MABDR GPX file and traced over them to create a route. Unfortunately, not all the roads are routable using the mapbox directions router. I've had problems with the GPS when following tracks with too many points in it, so for those sections that are routable I've overlaid routes. To reduce the chance of the GPS getting overloaded, I've split the tracks up into smaller sections. It looks like this should be a pretty good run and some of these roads are ones we definitely haven't been on.