Just finished rendering, took about 40 hours or so. I think the water killed the render time. Some notes about the render:
- To make the water look extra rough I modified it with the twist and shear shader and stretched it in the Y direction
- I did some post-render editing in Photoshop including brightness/contrast adjustments and I got rid of a small peak that was sticking up and looked really unnatural.
- I did the best I could to simulate a waterfall since it is not implemented yet. If anyone has any ideas on how to make it look a little more convincing, let me know

Let me know what you think!