I would like to mark on map pages the route with a bright yellow marker.
Maybe pages from a spiral bound map of France. The appropriate pages would be torn out, maybe pasted together, for each segment.
Michelin has a 1:300,000 spiral bound Atlas. (Their #724 Northern France folding map is only 1:1,000,000)
Am I just creating making up things to do (and carry)? Or is this map thing worth pursuing?
Are the directional arrows, riders in front & behind, locals out on the route, and cue sheets adequate for a mid pack 84 hour starter?
Spec' Tarmac (road), Spec' Secteur Disc (commuter & tourer), Salsa Mamasita (MTB), CoMo Speedster (tandem), Surly Big Dummy (cargo), Airnimal (folder), a train pass, and NO car :)
When doing the Transcontinental Race last year, with about 650 km in France, I marked my planned route on foldable maps, cut out just the sections that I would be riding through and brought those with me. I used a Garmin for on-bike navigation, but I like to look at a paper map when stopped to get a general idea of what is coming up, how far I am from certain places, and have a general awareness of what else is around me beyond my field of view. It was also my backup plan in case the Garmin went down, but fortunately that never happened. In PBP, navigation should be a lot more straightforward than in the Transcontinental, but you may still want to occasionally look at a paper map for the other reasons that I mentioned.
Anything in the 1:200-400,000 range would work well for this purpose, but for France I found the 1:250,000 series of "Regionale" maps from IGN (the official French map producer) to be ideal. Those should be available online, but Michelin ones are normally easier to find and would also work.
I predict that you would never bother pulling the maps out on the ride. I did run into confusion a couple of times on a roundabout when there was nobody around. But if you wait a bit, someone will ride by