In Cezanne's studio there's an exhibit of photos of Picasso taken by his friend, the Arles-based photographer Lucien Clergue and, hung in Aix's Vendome Pavillion, a show of 50 rarely seen photos taken by Jacqueline Picasso. The Picasso show continues at the Cathedrale d'Images in Les Baux until January 10th, 2010. And there's more. The French Government Tourist Office (FGTO) is suggesting a 10-stop self-guided tour from Antibes (location of the Musee Picasso) to Avignon (which the artist first visited in 1912 with his fellow painter Georges Braque).
You'll find all the info you need on the 'net. A good place to start is this special site created by the FGTO. And I found these three articles--in The New York Times, the Sunday Times and the The Wall Street Journal Europe--particularly helpful and well done.
Above: Picasso's "Arlequin" (1917) is on view in the "Picasso-Cezanne" exhibit in Aix.