I understand where you are coming from, but a tactical Nuke is only good for 5-10 miles. The article said the positions of the troops will be connected to their training area... I have never been there, but would guess the area is a few thousand acres or more. If the divisions are staged around the training area, you do have a nice LZ smack dap in the center...protected.
Just looking at it from not only their perspective, but a few others as well.