Well, that last one you posted is definitely Fall Creek Falls! Tough to get a really good picture of it!
I don't have any of the pictures I took with me here at work, and while I have a few of them on Facebook, I don't have one of Cane Creek Falls on there (plus, they were all taken before I had my D5100, and mostly concentrated on the bridge, and my sister).
But the more I look at your second photo, the more certain I am it's Cane Creek Cascades. So, I googled it.

The Cascades are a 45-ft. drop, while the Cane Creek Falls, which is just a bit downriver from the cascades, is an 85-ft. drop, which also has another fall called Rockhouse falls right next to it (125 ft falls, but usually barely more than a trickle for volume).
Here's a link to a photo of Cane Creek falls:
Cane Creek Falls
And here's another one, that shows several of the falls (although it's not a good photo of the Cascades to compare to yours):
Falls Creek Falls State Park, Tennessee
It all hardly matters, I know...the REAL point is, they are nice photos and I'm glad you got a chance to visit that area...especially since you seem to have gotten to see it before it gets warm enough for the hordes to arrive! On the trail to one of the falls, we were behind a rather large gentleman who chained smoked the whole way down the trail...so much for getting back to nature!
