I went though a BRAC too; was one of the last 100 families at Chaute AFB, IL. That town recovered and is doing better now then when the base was open. Many, not all, but many communities adapt. Peter is right, the government is not in the busiess of employing folks where there is no military value added. And, the millitary does provide excellent re-location and transition benefits most companies in the private sector wouldn't do.
But, realistically, the Congress will never do another large scale CONUS BRAC; its just too politically painful. Some overseas will see reductions of course. This still leaves the Air Force with 20% excess overhead that will cost us precious dollars.