Thanks for sharing your photos
Trying to get super-crisp fall colors, while at the same time having a blanket of thick fog over them, almost seems to be a mutually-exclusive proposition ... as the fog (unless very clearly-defined) will be masking all of the colors. For reasons like this, it sometimes is very hard to be able to achieve "in a photo" the beauty of what you can actually see with your eyes. That is the trick!
That being said, the first two photos don't do much for me at all, to be honest, because the fog pretty much hides whatever colors were there to be captured.
The third and fourth photos are my favorites, because (to me at least) they seem to be the best balance of achieving the effect you are trying to convey: illustrating the fall coloration while at the same time they are swathed in fog. I do agree with some of the others that the great blue heron should have either been composed more prominently (or not at all), as he draws attention away from both the fog and the coloration, with not enough detail in his own right for a "payoff" to the viewer.
The 5th photo is almost nothing but fog, and therefore inneffective IMO, while the 6th and final photo does capture the viewer's imagination with its "dreamy-like" fog, with enough bridge detail to evoke thoughts of "where is this?" and "where does it go?" Unfortunately, what ruins this dreamy effect in the end is the little outbuilding the viewer can see just behind it, so for a final revision I would personally try to edit that out.
Keep em coming---and thanks again for sharing