This should only affect those individuals that are staying on-site.

Please be aware that new procedures for entering Wilson Hall between 8:00 PM
and 6:00 AM may affect those needing to pick up keys for housing.  Most
entrances to Wilson Hall will be accessible only by displaying a valid 
Fermilab ID card to electronic card readers.  This became  effective on 
Monday, August 28, 2006..  More information is available at the following
link:
http://www.fnal.gov/pub/today/archive_2006/today06-08-25.html

New arrivals to the Fermilab Site without a valid ID that will be living 
on-site should inform the Security guard at either entrance that they need 
to pick up their key for housing.  The Security guard will then check that 
the new arrival(s) are listed on the Daily Occupancy/Security Report.  The
Daily 
Occupancy/Security Report lists those staying on-site, as well as those
arriving 
later that night.  When the Security guard verifies the listing on the 
report, the new arrival will be directed to the Communication Center on the 
ground floor of Wilson Hall.  Security will arrange for someone to open the 
door to Wilson Hall for the new arrival.  Then, the new arrival can obtain 
the key and other Housing information at the Communications Center.

IT IS VERY IMPORTANT THAT ALL NEW ARRIVALS BE LISTED ON THE DAILY OCCUPANCY
REPORT.  

The Housing Office must be aware of all authorized residents, 
guests, and new arrivals for all houses, apartments, and dormitory rooms. 
Failure to be listed may result in delayed access to the site.  Please 
inform other Users and residents that all new arrivals need to inform the 
security guard at the gate that they have reserved a place to stay on the
Fermilab site.

As long as you have a valid Fermilab ID card, you can enter the site and 
access Wilson Hall.