I am also playing this on the couch with my fiance and it’s very helpful to have a second set of eyes. She lost the thread and went back to reading Ringworld when I was in the swamp, though.
I think discrete descriptions of the section followed by spoilers works. I appreciate @Chevluh concealing The Big Thing.
RE: panels on the ground I’m not so sure those are arrows. I’ve found several more.
Hint RE: trees look at the shape of the pictogram on the panel.