Took a overnight hiking trip with a few friends, these are all quick shots except the waterfall one. Really didnt have time mess with aperture/shutterspeed.
I like these a lot, however I am concerned about your B/W (black and white) conversion. Photograph number one is too dark and number three is too light.
Both most likely had plenty of green in them. Adjust the white balance to make the photograph cooler then you the channel mixer. Just a thought. If you want more detail, just ask.