There’s a T6 and a Stampe based at Abbeville, along with a very smart SE5A replica and several HM293 devices. Quite a lot of vintage gliders too.
If you’re a puffer nutter as well as an aeroplane anorak you might visit the Chemin de Fer de la Baie de la Somme. Tremendously fun and can be combined with a good (i.e. hydraulic) lunch.