The USAF Museum I liked better than even Udvar-Hazy and the A&S museum on the Mall. Been quite a while since I was there, you still had to take a bus to Wright-Pat to see the SR-71 and XB-70 and Presidential airplanes.
I live near the corner pocket of the USAF Museum. It is a magical place that requires at least a full day to appreciate.
There are no longer bus shuttles to the remote exhibit hangars as the expansion of the main complex now houses the exhibits.