I never did more than two night tours where I could just carry water in bottles and sometimes fill it up again when the track went trough civilization.
But I now want to do longer tours and carrying water seems extremely inconvenient. How do you get clean water? Filter? Pills? What are the pros and cons of those?
I also should mention that I live in Germany and I come across agriculturally used land all the time and I'm not sure how toxic exactly the literal shit is that the farmers put on their fields so I don't know how safe the water is in general