When we stay at WDW, we stay on site. This year I booked 4 nights at the cabins on the Wilderness Campground as my sister will be staying with us a few nights - so we needed room for 3 adults and 2 children. We always rent a car because we combine our theme park activities with a visit to family (sister and mom) who reside in Daytona and New Smyrna, and also rent a house or condo for some time at the beach. This year will be the same, with a longer stay. We arrive and depart from MCO, but our trip is kind of "split", as in MCO to NSB for 4 days, then to Orlando/WDW for 5 days, then back to NSB for 4 more days. With that in mind, I am unable to rent a car from the Daytona Airport or the car care center on the WDW site. We don't go to WDW every year - on off years we go to Universal, Seaworld, the springs, Tampa, Miami, etc. A car comes in handy so we don't have to borrow one from family
Perhaps I will try the KLM code after I join that site. We used the kiosk last year and bypassed the counter, and did not pay a cent more than the $159.53 for a 9 day rental. We rented a "fullsize" car but drove off in a Cadillac for the same price. The codes I used last year was a BJ's code (supposedly 25% or so off) and an AA Valley offer code for $35 off. And I am an "Alamo Insider", so I booked with that also.