What are you filling it with? If you fill it with potable tap water it is chlorinated, in most civilized areas of the world
It would be good for several days minimum. As for traveling - I never travel with full water tanks, Pods have known axle and weight issues. Personally even that 300 lbs to me is a risk. Just me. Too many sources of potable water when traveling. I own a 178 and a full water tank (tank in rear) definitely adds to sway. IMHO. Happy trails.