We don't even need them on NK. We already publicly have high-precision conventional bombs and missiles, including precision bunker-busters.
As far as dealing with NK's massed, bunkered artillery, what we need is a set of platforms that can loft several thousand precision munitions into range of the NK's artillery emplacements, and ripple-fire them very rapidly. This could be done with a moderate-size fleet of stealthy blimps
Or, we could force them to look at pics of Mrs. Kerry.