Here's some information for you: A commercial wheel-packer has been purchased for use by all of the involved parties at Bonneville. It's needed because in some places the salt is not only thin - but cracked and pushing up. See attached photos, the first of which is the crunchies themselves, and the second is a side by side shot of before and after wheel-packing. If a drag is pulled over this stuff the salt will scatter and not necessarily become smooth and even. The wheel packer knocks down those ridges - a/k/a crunchies - enough that then if it's dragged a good surface will result. It may turn out that no dragging is needed, but whatever - the wheel-packer will help. It's almost a necessity to use it on the international course -- the one used for the Shootout, especially near I-80. But everywhere will benefit from it, I expect.
Please, however, don't think that the courses are in terrible condition. It's noted elsewhere here that the conditions were good at the T&T and will probably be only better at SpeedWeek. The wheel-packer should help to improve what we find when we get there.