AGC is for recording meetings. Cardioids are harder to windproof that omni's. But that foam cover is what is needed. Do not leave home without them. 
Hear hear! I taped an outdoor jazz festival in July and it was just ruined by wind noise. I made a bit of a last-ditch effort to windscreen my KE4's with my hands. And the stink of it was I know 2 of the backing musicians personally from other shows as well as I've taped both of their other projects. Anyways, illconditioned is putting together a mod for my hat to prevent wind noise at future outdoor shows.