Apparantely, its going to be a nice day tomorrow. The problem with your shale is that its very clay based, and unfortunately the water will stand. Ez would be wize providing the forcast is right to drown it about 5 pm. Where you are you do get plenty of wind, so providing its a warm drying wind that is fine.
That said, Ez can prepare a very good track, and the riders should have some input, but Ez should be left to his own devices. You do need that home advantage...Nobody else should get involved.