Grandcamp-Saint Vaast
The journey, Amsterdam to Saint Vaast..
The large ports are fairly easy, as they have mostly 24/7 access i.e., no restrictions due to tide
The smaller ports, vi have visited lately, however, either have a lock that operates at certain hours, or a gate that opens at high-water +/- some hours.
When you further have to take winds and strong tidal currents into consideration, it makes navigation something of a 3D puzzle to solve. With the aid of various apps to predict weather, wind, tide and currents, it is doable, though :-)
A crowded lock at Ouistreham
The approach to Grandcamp-Maisy at low water - we sailed it 6 hours earlier :-)
Passing seemingly dry ground (green) - photo of our plotter