Thanks for the feedback.

Just for clarification as this was possibly missed based on some responses. In the posed case/question there is no drafting (training or formal century ride). And the question posed assumes similar terrain and weather conditions.

In case anyone is curious in my case 'the plan' (where plans are things that are meant to be changed)
will be a 100% solo thing where my wife will meet me to create a couple of "rest stops" and will (via cell phone) be my SAG support. Conveniently my route starts and ends at my front door :-)

dave