Here's the link to the YA novel I came across while searching for fog-related images on Google. I found a great beach scene while doing some searches, an image I'm using as my wallpaper right now, imagining events from my novel unfolding on the sand as I look at it. Helps to visualise. Anyway, one of the images that came up was the cover to a fog-related novel, ISLAND OF FOG, so I checked it out, and while it's not relevant to my own work, nonetheless it was interesting, and I was very impressed with the clarity and style of the writer, who has worked on the first four chapters for several years, editing them and getting feedback.
I only read the first chapter, but it was impressive and I do hope he'll keep at it and finish the novel since it should certainly be publishable. The guy can write! He has put the four chapters on lulu.com, and they can be purchased in book form for a few dollars, or you can even download a file for free and read them off your computer.
It's worth checking out to read his prose. You won't be disappointed.
Otherwise, I'm still working on answers to those two questions! But at least I know what to think about, and how to think about it, so that helps! I should have an answer by tomorrow, I hope, and will post again then.