'Assume good faith' is part of the HN guidelines.

Not OP, but as someone who had his first trip a couple of months ago, I can relate to a couple of points you're calling out.

Regarding integration: I have had appointments with a therapist specialised on integrating peak experiences and for me what worked was to have someone to discuss and extract meaning and insights from the trip and find 'hooks' how to make them part of daily life.

Regarding the amnesia, I can also relate. I still remember the insights, the lessons, the characters and the meaning of my trip. But it gets harder and harder to connect to the feelings of the trip, which in turn make the insights less 'sticky'.