Information about getting to Fermilab and gaining access to the site can be found on the various pages linked from the Visit Fermilab website.
Information on visas, business-related visits and site access for foreign nationals can be found on the pages linked from the Fermilab Global Services website.
For information about on-site housing, see the Accommodations -- Housing General Information page on the Facilities Engineering Services Section website.
There are numerous options available for off-site accommodations. Please consult your favorite travel web service for more information.