No special access issues
Park to the end of Allee des Vaches.
Total walk is around 1100 - 1200 meters, depending where you are heading.
Walk 400 meters, take the left fork in the road, walk for 450 meters, take left. After just 100 meters you'll come to a sandy opening.
Either continue and you'll go towards Apremont Center and Egoiste, where you can take a right and end up to Hyper Plomb and Medaille en Chocolat.
Or take the path to the right, walk to Piano and take left from the first path to the left or the second. First path leads up to Hyper Plomb, second to Onde de Choc.