I pax'd out with an Air Two Bob crew about 10 years ago and had three days there courtesy of a benevolent DFO. Fascinating place - so much so that none of the Trolley Dollys wanted to go shopping - no really!
Had an introduction to a Brit forestry expert who took us all up-country, in the back of his Toyota pick-up, and showed us the real rain forest. Terrific experience.
I remember that on departure, when we tried to push back, the tow bar went into self destruct with the nearest replacement being days away.
Quick phone patch to ops for authorisation and we powered back without any further ado.
If Manaus was easier to get to I wouldn't mind going again.
FW