Yes, BSAS it's quite a bit crazy, anyway! :-)
However, if you come back to Argentina, and you are interested in dreaming states, I would recommend that you travel north to formosa, to see the Wichi Shamans, which have a very interesting dream technology of their own, which I am trying currently to study.
And yes, the visualization of the mandalas requiere some proficiency with the ilusion body yoga. But it's quite easy to find literature and teachers (at least here! :-) ). If you like, I'll send or post some of it.