|Swampster in the bulrushes.|
As for wargaming....
In DBMM terms I think I calculated that the marsh area would qualify as a 1 ME piece. Whether it is wet enough to be 'marsh' in rule terms is debateable though it is certainly far enough away from a river not to count as the marsh allowable adjacent to a water feature. It is certainly at least boggy ground. It did strike me that the rushes would be tall and dense enough to hide light infantry though their presence would likely to be revealed quite quickly if there was any movement.
The wet meadow is much drier (or was when I visited in October, though the autumn had been relatively dry) and might count as either open ground or some kind of rough going.
On a closing note... one of the reasons for the survival of this area of marsh (now an SSSI) was through the work of my father and his colleagues during the expansion of my town. Draining of the area had certainly been considered. He also helped to ensure that the route of the ancient and Roman road was preserved as the area was built up. Thanks, Dad.