i've never really seen the point of distilled water with all of the crap thats already in the cooling system, plus the fact that one of the main functions of antifreeze is corrosion protection, if it can't handle the slight amount of impurity's in the drinking water theres something seriously wrong
if you are topping up the system there should be no problem with bleeding, that only comes in when the system is drained and full of air
all america wants is cold beer warm cat and a place to take a poop with a door on it