I love pics #2, 4, and 5.
But #2 is slightly underexposed (The camera probably metered for the sky thus the trees are underexposed. Try a different metering mode such as center weighted average or spot metering if your camera has that function)
Also #4 is overexposed by quite a alot.
But anyway. With proper gear and a circular polarizer, those pics will really shine.
The composition on pic number 5 is outstanding
