As a native Floridian, these old trails remind me of the roads we would take to cut through the state as a kid. I never understood why my parents didn't just hop on I-75 and I-4 like everyone else. But looking back I'm glad they did. There is true beauty in the old Florida that these highways represent.
Here is my first idea. Dont let the colors fool you, if done properly, this woks fine in B/W as well.
On #15, I like how you incorporated the front leaf, but the focal point should be the tree canopy - the white in the back looks like a mountain - an as you know - there are no mountains here in FL