Welcome to the Nexus!

If I were you and I had a bit of time, I would not travel to south america just for the retreat, but rather travel to south america, and have retreat/ayahuasca/other ceremonies as an addition.  There's so many different places to see and people to meet.  You can have a more certain retreat to guarantee some good ayahuasca taking, but also travel around and see if you maybe can get to meet some less known local curandero/shaman/group and have a different experience. Also there's san pedro-related shamanism in the andes which might be interesting (Ive got no experience with that). And appart from that just travelling around south america regardless of entheogens is a great experience, and can be as much of an important experience as the ayahuasca.

Appart from checking the experience reports mentioned above by Oly and Antrocles in the quality experiences report subforum, here's a couple of links that might be of your interest:

[URL unfurl="true"]https://www.dmt-nexus.me/forum/default.aspx?g=posts&t=30503[/URL]

[URL unfurl="true"]https://www.dmt-nexus.me/forum/default.aspx?g=posts&t=18342[/URL]

[URL unfurl="true"]https://www.dmt-nexus.me/forum/default.aspx?g=posts&m=252133#post252133[/URL]

[URL unfurl="true"]https://www.dmt-nexus.me/forum/default.aspx?g=posts&t=18546[/URL]

[URL unfurl="true"]https://www.dmt-nexus.me/forum/default.aspx?g=posts&t=18911[/URL]

[URL unfurl="true"]https://www.dmt-nexus.me/forum/default.aspx?g=posts&t=21436[/URL]