I did some car camping in North Dakota while day tripping on the Maah Haah Dey trail for a week in 2015. I saw three different bike packing groups, two of which had run out of water hours before arriving at the campground very thirsty and the third group instead had taken a detour hours earlier to get water from a source they saw on a map when they ran out of water. In other words, 100 percent of the bike packers I met had a water shortage problem. In all cases, if they had also had an injury or major mechanical failure, they could have been toast. One of those groups quit after they made it to the first campground, deciding it was unsafe to proceed.

I have never claimed to be an ultra light packer like the bike packers I have met. I consider myself to have run low on water if I had to open my last bottle.

My point is that water supply is of extreme importance, don't roll the dice.

If all else fails (such as filters, and I have had a filter fail), boil water to disinfect. Cooling that boiled water when you are thirsty can be an issue of course. I have on occasion mixed water from my water bottle with water that I just boiled to cool it down to the point I could put it in a plastic bottle.