A certain proportion of tankers will have to at least attempt to reduce detectability because projecting power across the pacific is going to mean that they'll have to be closer to the combat aircraft - and the enemy will obviously make efforts to down the tankers. The KC46 fleet is looking at using AI support for 1 or 2 crew full operation - suggesting that either there will be a need for many more tankers in the sky or that there are too few crew in the system or coming down the line - obviously in a war scenario these numbers could well be augmented by civ type rated aircrew after all the reserves are recalled.