To anyone who might be curious to try these substances:
Both iboga and datura can be deadly!
Beware!
Both iboga and datura have been used in traditional shamanic contexts, and ibogaine (derived from iboga) has shown some promise in treating addiction, but usually this is done with a medical team trained to handle possible dangers.
I know of no remotely safe way to do datura at psychedelic dosages.
Most of the datura trip reports I've read have had a nightmarish character to them, with true hallucinations (ie. ones where the user does not realize that they're experiencing something that is not there), often involve the users putting themselves and/or others in physical danger, and often result in amnesia.
More can be read about iboga and datura on Erowid: