Air Force Navy Lodging "availability" websites are "unsafe"?

I searched for "Air Force Inns" and was at the main site. I looked in the "directory" on the site for Peterson AFB and clicked on it. I clicked on "check availability" and the message came up. I have had the same luck with Navy Inns. In the past on Navy campgrounds site have gotten the same result. I called the Navy number and got a real person and made reservations. We are thinking about attending a wedding in July and want to check availability before planning the auto trip.

WWW.DODLODGING.NET