@guide42.eth
I have lived with the Q’eqch’i in Guatemala near Coban and went looking the Penan in Borneo (Malaysia) near Bario. Not really western communities that went “green” but autonomous people living (mostly) isolated. The mayans doing agriculture are easier to find as they are not moving every day as the Penan. It might take one or two months for them to accept you and you’ll have to contribute to eat. DM if you are really interested and I can give you more information (like a dictionary so you start learning their language beforehand).