Hi Roundisland
I would really recommend a tour we did a few years ago, loosely based on a route from Tom Vernon's "Fat Man In France" book, you'll get a huge variety of terrain (coast,mountain,plain), loads of history/culture ( Cathar Castles, Carcassonne, Canal du Midi, Roman Arles, Avignon), great food and wine etc.
Stay on the Bike Bus 'til Perpignan, dip your wheels in the med if you wish, then head up the Tet valley to Villefranche and take the "little yellow Train" into the mountains (cheating, but great fun).
You then freewheel down the Aude gorges/valley, crossing Cathar country before meeting the Canal du Midi, visit Carcassonne, follow the canal to the coast.
Choose your route via Montpellier, Aigues Mortes, Camargue, Arles then onto Carpentras / Ventoux area for a ride up the "big baldy" before taking the bus back from Orange.
Aswell as giving you a taste of 3 distinct regions - Catalonia, Languedoc and Provence you have the benefit of properly acclimatising before the ascent of Ventoux, and you'll have it as highlight, literally, to look forward to during the tour!
If you'd like any more detail feel free to PM me.
Ajay
ps. I agree with The Doctor, you must include the Gorges de la Nesque on your Ventoux day, a stunning corniche ride. Enjoy
(I'll be there again in June, bring it on!!)