This is great, the themes presented along with a very visually appealing look make for a great read. I like the Crate mechanics as an additional hurdle the party must overcome. Some changes to consider:
A bit - > A Bit
The Lighthouse could be mentioned as the Foghouse
There was already some disqussion on the trick thing, but it does seem it was mostly intended as a weaknsess. From 0E:
TRICK: Players need to fight smarter, not harder. The Trick section provides just a few possible exploits to take advantage of in order to survive or end the fight as soon as possible.
However, in Into the Fog one of the creatures does have a benefit along with its weakness, but the overall intention is pretty clear.