Sanary sur Mer is a lovely very "beachy" french seaside place, great beach , and IIRC Pradeaux are at the back of the town, well worth a visit. 10 Mins away is Cadiere D'azur, and the Hostererie Berard there is well worth a visit - michelin star level cooking, and a mature Bandol list that will make you drool.Visits at Bunan, Pradeaux, Pibarnon are all worth it. Tempier are now so popular you only get a taste of the basic rouge and can't buy any of the top bottlings. If you have a connection to A&B they might be able to get you a better visit . Lots of other place to visit , but 4 days is short .
Sanary had some good seafood places on the seafront. Bandol I like the Poisson D'Argent for good seafood, but the Hostelerie Berard is the place to go to drink red Bandol and red meat. Will have a think for more reccos.