Thanks for the replies and your advice rings loud and clear. We will not have a support vehicle following us per your recommendations.
I have biked a few week long tours across a few states with support vehicle but it was not following us. It would stop every 20 miles or so and set up a rest stop with food and drinks. And yes my son was a on an athletic college scholarship and he is way better than I am as far as speed goes. But we have been on a few long rides and he is fine with it.
Thanks