When arriving at North Rock, "First Crack" is the first real obvious crack encountered on the way up it's length, 50' up. Not surprisingly, "Second Crack" is the second one, maybe 30' further.
"Second Crack starts as a few moves to gain a very shallow, right-facing, arching corner, then pulls up and right to join a crack system, which after a few feet is abandonded for a second parallel crack just right of that.
The amount of moss and lichen on this route may not be a problem when dry, but when wet leaches out a slimey mess onto the rock that makes a the bottom insecure. Be careful.
A set stoppers and a set of cams will do just fine. You can't exactly sew this one up and there are some runouts at the grade. This rotue is slick in moist condidtions and might be dangerous at that.