Turning the antenna in the treehouse gives different messages of about two minutes each. It’s a bit hard to listen to the whole thing without someone else interrupting by changing the antenna, so here are the audio files:

https://neal.fun/cursor-camp/sounds/harold-1.mp3

https://neal.fun/cursor-camp/sounds/harold-2.mp3

There’s talk of the tent near the beach, the gong, and gathering at the big fire once you hear the call. There’s also talk of the cave, the star map, trusting the bats, and reading the right side of the book carefully. Though it seems to me the audio may be outdated and that the star map was initially in the book and was since moved to the telescope.

The right side of the book mentions the time 8:47.

If we look at the star map, only two of them are pointing inwards. If we consider that a “convergence point”, it should be around the area of the big fire and tent.

That’s as far as I’ve got with this.