Looking really good Bobby.
Couple o points...
You got that odd light glow from the sun behind the tree, It will increace render time but see how it looks with "Receive shadows from surfaces enabled", you may have to enable it on all your atmos and clouds, do some tests.
See if you can find some Water Lilly models or duck weed to populate on the water surface but keep some clear areas, make them pretty dense with a clear channel in the center.
You could put that boat house off in the distance just slightly.
Great work, keep at it

Richard