Quite honestly, the map is a suggestion for planning purposes. It's really up to the people riding a particular segment as to how they get from A to B to C. You'll have your start location (A) and your next overnight location at (C). How you get between them is really up to the riders there on the road. Of course, if someone says "Hey, I wana join the ride, can I meet ya at Point B at noon?", then factor that in. I hope any Point B riders speak up ahead of time and don't just look at the map and sit at the side of the road waiting for the thundering herd to pass by!!
You'll also need to factor in other things like road construction, weather, scouting reports on some sweet twisties, a really great rib joint, etc. Pick a Road Captain and let majority rule be your guide!