I spent 5 months in 1996 backpacking through South America, including your destinations OP. Totally wonderful experience.
Took too much camera gear - about 12 Kgs (though that included 90 rolls of slide film which I carried much of the way through, then got developed in Chile.
The South American Handbook was fantastic. Sure, I got a machete held to my throat which relived me of my 9xi. Whose fault? - my own for not putting it away after use.
Got out the spare 9xi I had bought 2 days before, rather strangely from the front window of a chemist store. Willing to bet that that stolen camera went straight back there ;-)
The embarrassed guards at the temple de la luna (who'd said it was safe to walk through the fields to the river) put us in the back of a ute and chased peasants through the fields. They cornered 2 of the 3 thieves, and pointed their automatic weapons at them , asking if they were the ones.
"No...no certainly not" I said. Let's face it, the next day I would be on my way only one camera lighter, and there was no way I was going to confirm the identity of those young men in front of the very aggressive, possibly trigger happy guards.
I have a story, they made a few measly bucks, and no one is dead.
Have a great trip (and if it happens on a Kwaka - even better)!