Oh yeah, while he's waiting for the fog to clear -- is there any condensation on big leaves, etc, that he could use to gather some water into the bottle?

He's going to very carefully approach the fuselage, still keeping alert.

If he doesn't sense any danger, he'll search through it. As usual he's looking for anything useful, also with airplane specific expectations like tools or water containers or bags, anything that might look like the black box, etc. He'll also be taking note of which part of the plane it seems to be -- if it has the pilot cabin, he'll try to make his way there and check if the comms or anything else is still working.