There are two starting directions:
30° has a nice, long, shallow and well maintained meadow but (!) this meadow is surrounded by high trees. the only obvious way out is a tiny gap at the bottom at ~35°.
330° has no slope at all. a flat top of great meadow grass abruptly turns into a cliff full of nettles. Due to the form of the neighboring slopes all NW winds are channeled up that cliff.
Landing
The Landing at 49°23'29' (49.3915)N; 0°51'7' (0.8522)E is badly overgrown and tiny. Also the neighbors appear to love barbed wire, which they spread generously along the river path. The local map states an auxiliary 'atterisage delta' (49.392013, 0.860188). well, I suggest everybody should have a look into that one. otherwise, if the water is low, the banks are wide - and rocky.
The path to the landing leaves the main street about 150m east of the start. it's a long, steep path but - if the upper gate is open - passable for cars.
Access and parking
GPS finds the starting position quite well. the rest is easy.
No official access to the current landing. 'atterisage delta' only accessible
via Yville sur Seine.
Forecasts are planning aids, not safety clearance. Check current observations, official airspace and NOTAM information, local rules and your own experience before every flight.