One of your first stops should be Office of Tourism of Lhuis. Here, you'll be able to find your bearings and get some great tips before you start exploring.
If you love hearing the word "free" as much as most travelers, you'll be glad to know this tourist information center is exactly that. Office of Tourism of Lhuis is located in Lhuis. If you want to keep your travel schedule full while you're around these parts, also drop by Maison du Pays des Couleurs and La Maison Ravier.