Yeah, I had a 15 gallon blue barrel full of water, and I would have to wait until mid day for the transfer pump to unfreeze. I'd refill water bottles and keep them in an empty cooler in the car. Then I had access to water in the morning and evening if I needed. I also completely forgot to put tape over my barrel. If I was really doing some bushwhacking, I'd take the bolt out and check when I got nervous.
That & the barrel to barrel non sequitur threw me off, briefly.