Do the people following your tour really care exactly what roads you use? If not the tracking may not really add much useful info. I found that my friends and family were fine with a short text entry each day saying where I was staying, how far I rode, and mentioning any interesting points or events along the way. They especially like it if I add some pictures and interesting anecdotes now and then.
Pete, I agree except for the occasion when you're in the boondocks, your family wants to know where you are, and you're in a place with no recognizable places on the ACA map. Dad called me one evening asking where I was. I told him, he couldn't find it on the map, so I told him it was about 15 miles east of Owl Creek. (Don't know how I can remember that!) He couldn't find that either, but was finally convinced we were doing well wherever we were.