Is this enough information/certainty to plan future missions? Can we count on water being there to use for fuel, etc? Or before that point will we need some k

Is this enough information/certainty to plan future missions? Can we count on water being there to use for fuel, etc? Or before that point will we need some kind of scout mission to figure out specifics like "there are X lbs. of water at this site in 3 ice puddles here, here, and here"? If so, how would such a mission work? Manned?