Stayed up way too late last night "working" on this. OP if you're trolling, you got me, but this is intriguing so...
I searched the reddit account "BurnAccount_SWIM" through Google and came up with this deleted post on r/psychonaut:
https://www.reddit.com/r/Psychonaut/comments/2z3h8b/first_trip_of_my_life_cactus_and_mushrooms/In it, he talks about his first trip experience and links to an imgur album of 11 different photos. 2 of which are on the printed sheet OP found in the notebook.
Link to imgur album:
http://imgur.com/a/hyS6J#0