This area I hunted was pretty picked over until the rains came and washed out the gravel.  Also the local dirt bikers ripped up some of the pit allowing more gravel to show.  I went a day after my father and brother to this location, and had decent luck.  They found some nice teeth including a few nice ptychodus teeth, and a couple nice cretoxyrhina teeth.  My luck started by finding a nice 1/2 inch ptychodus anonymus tooth in someone elses foot print.  Alot of the ground is being covered quickly by grass and bluebonnet flowers, so hunting areas are shrinking.