There is an unknown problem with the reflections that I can't quite work out what is happening, the terrain seems not to cast a reflection but the objects on it are, I must have another look at the files, there's a definite problem.
The boat wakes are a bit extreme, indeed, especially from the canoes.
I love Danny's clouds in the first couple of images, maybe some more samples would be a good idea as they're a bit grainy in places round the edges but the sky in those is very nice I think, neither over, or understated, just a natural sky that doesn't draw too much attention but is very realistic looking. It's nearly completely overcast but still controlled well enough to let the right amount of light through to the rest of the scene.
