longtallsally, it sounds as though you have the route you want to follow. Now it's just a matter of figuring out how to convert it to a track in Basecamp. I've read here somewhere of how to do that. I'm still mainly a Mapsource user and haven't done enough with Basecamp to be able to tell you "how-to". Explore the various menus/options in Basecamp, you'll find it. Right click on the route in the map to see what options that brings up.
Not all who wonder are confused