Port Grimaud is entirely pedestrian — cars are not allowed inside the village. You park in the large car park at the entrance (paid in summer) and walk in. Within the village, everything is reached on foot or by boat. The canal network can be explored by renting electric boats from the hire outfits near the main entrance.
A small tourist train runs between Port Grimaud and the hilltop village of Grimaud a few kilometres inland — a convenient way to combine both places in a visit.