As someone who is interested in taking a guided trip to help with some personal problems of mine, how do you go about finding these people who perform guided therapy sessions w/ MDMA/LSD/DMT etc?
If you can afford it, these 5-MeO retreats are probably a slam dunk, although 5-MeO is not for the faint of heart. Check out the psychedelic toad - hamilton's pharmacopeia for more on that.
All you really need, though, is a high-dose mushroom session with eyeshades and music, supervised by someone's that's done it before whom you trust. Their sense of attention and compassion are more important than extensive experience using them. They're just there to hold the space. Again, see James Fadiman's book for the how-to.
I'd prob try looking for a counselor/therapist that has tried psychedelics and has helped others. You can probably search for them by looking for healing centers or retreats, specifically in the PNW.