In case you haven't already found a deal: Don't know if it works with vans, but use the code "SAMS" at Thrifty and you get 10% off and if you use it again, you get a GPS rental for a day free of charge. I had this flyer from a vendor show I forgot I had. Also, look in the coupon section of your yellow pages (who uses those things nowadays, anyway?) and there are plenty of discount coupons for various rental companies.
