I have a question about water filters; I have been reading up and I keep getting conflicting reviews. I live, literally, on the banks of the Cumberland River, so I have unlimited water.... I just have to filter it. For backpacking, or a bug-out, I would use a Katadyn filter, but to shelter in place, due to a power outage or storm, I was thinking Big Berkey. Amazon has so many conflicting reviews, I don't know what to think, can anyone help?