We put down a final layer of really nice dirt on top of the South Bed. We ordered 5 cubic yards of Growers Mix delivered from Austin Landscape Supplies. $265.21 at $35 a cubic yard plus $70 for delivery.
We covered the South Bed, both left and right, with about 2 to 4 inches of this dirt, trying to create a nice smooth finished bed.
There was dirt left over -- we probably only needed 3 cubic yards for the bed itself, but we will be able to use this for the next excavation area.