Here is a photo of the crawl space before we started doing the "real" work. The fiberglass batts were already removed in this photo so that the crawl temps were similar to the temps above.
Dimple matting and TerraBlock are installed on the floor. This allows the ground to dry out if it were ever to get damp, and it also keeps the Earth from absorbing the heat from the crawl space.
The finished product includes CleanSpace (20 mil) thick vapor barrier and closed cell spray foam on the walls and rim joists to make the building envelope perfect.