Cooking and drinking water

I never fill my fresh water tank. I have a little bit in there like others have said for bathroom stops. I just cant see towing that much more weight for nothing. We usually always have water hookup at the campsite and I put a filter right at the inlet for the trailer. We use it for everything including drinking. After all we are camping, I would drink out of the lake if I had to. Its not like we are camping in mexico, I think we can pretty much trust the water.