>I drain my tank every time I use it.
>I leave the drain cover off and start running water into the fill before
>I put the cap back on, it flushes out any dust that might be in there. I
>drink bottled water when I camp, same stuff I drink at home in 3 gallon
>jugs.

Thanks Stan. I would never drink the stuff that comes out of that tank :)
but one time I left it about half full for a few months, and it came out
really rank, so I was wondering if it should be temporarily stored full or
emtpy.

I am on your side with the fresh drinking water in jugs :-)

Regards,

John