Just back from Vezelay the route is well marked by two different groups, sometimes overlapping sometimes going offseparately. The route marked by the guide of Monique Chassain is marked
View attachment 11195 sadly the guide is very outdated concerning lodging food etc however her maps are very good. The marking on this guide often utilises the existing GR marks in places where they do actually overlap and you may not see them.Your other option is Randonnee guide which marks a slightly different route with the French hashmarks, the red and white stripes also seen above. The GR is longer, laid down to avoid pavement which is a good thing but may be 5-10 kilometers longer in order to pass between the same two places - the authors love cow pastures, forest paths, but beware warnings such as Très humide don't mean just very wet they mean mud up to your shins! The GR guide is super up to date and lodging, food, and tourism are all right on. I took both and planned using both options often on a daily basis. Bon Marche,