Cooking and drinking water

When not boon-docking we only keep a few gallons in the tank, for toilet and hand washing. Why carry the extra weight at $4/gallon. Drinking water we always fill jugs and bring them from home. We take 4-6 gallons which is enough for us for a week of cooking/coffee. If we run out we go buy a gallon. I have a filter to, but why risk it. The whole rig is filter and I have watched people use the spickets for all kinds of things and with out back flush protectors all their germs just go back into the system.