I am going on a 100km hike through the rainforest, I have some questions.?

My departure is going to be from the town of Iranduba, I am headed South. I need to finish this trip in ten days. I need to cross the river on the first day. I was wondering what the most effective way to cross the river would be? I was planning on either renting a boat from a local or having a local take me accross. Also I am carrying 50lbs of gear at maximum. I have a well thought out list but what would be your suggestions to bring along.