Here is the info from Mousesavers:
Locations Near Disney World and
Disneyland
Enterprise is on airport property at the Orange County (California) airport, but is off-site at the Orlando airport.
Discounts, Codes and Coupons
The 2008 Entertainment Book offers many coupons for Enterprise, including 10%-15% off standard daily rates, 10% off standard weekly rates, one free weekend day (on a Fri-Mon rental), free upgrade and more. Enterprise coupons in the 2008 Entertainment Books expire 6/30/09. See your book for coupon codes and the necessary paper coupons.
Look in your local Sunday newspaper - Enterprise coupons sometimes are attached to the weekly TV listing included in Sunday papers. I have seen this in several cities around the country.
If you have GEICO Insurance, you can save 10% at airport locations and 20% at other locations. Visit
www.geicoprivileges.com and log in to your account for details.
Also if you belong to Cosco, BJ's or Sam's, they all offer discounts. Check their websites.
Crissi