I've probably done more entheogens than most and my assessment is panpsychism is real and that consciousness likely precedes matter.
The trouble here mostly is that it's incredibly difficult to explain this in words let alone demonstrate what happens (via empirical methods) and even more difficult to enact a living system based on these experiences (the Hindu's tried and failed, IMO). It's good that burning man makes a noble attempt and I should have gone when the opportunity was still available to me 20-years ago.
Good on ya for being brave enough to take this on!