Keep the same mas or village hotel. Provence itineraries fail when they look like a bus tour.
3 nights: Luberon
One market morning, one village-and-viewpoint day, one lavender or vineyard day in season. Car essential.
5 nights: valley plus monument
Add Pont du Gard and either Verdon or a second market town. Pair with Paris on a 10-day France trip, or continue to the Riviera if you have two weeks.