I'm hoping to travel by boat from yurimaguas through iquitos and ultimately to coca. Has anyone done this trip recently? Any advice? Is it possible to sleep on a mat on the boat or will I need to get a hammock? I already have a good thermarest mat and would prefer to use it but everyone seems to sleep in hammocks I wonder why? If it turns out I do need a hammock what is the cost to buy one on board or at yurimaguas? Thanks and enjoy your travels everyone!