Traveling in a few weeks. I know conditions probably fluctuate during the rainy season but wondered about river swimming in general around the lodges that highlight river swimming on their grounds. Muddy? Is there much of a current? If doing a tour with an independent company as opposed through a lodge - how much in advance would we know an activity based on river conditions might not be able to go forward and is it then easy to just go with the flow (pardon the pun) and substitute something else with that company?