Unless you have a very good deal at Hilton, Cancel and rebook at a Mid Priced Disney Property.eg Port Orleans.

Free Round Trip Airport transfers and Bags direct to and from Room.

The Disney Magic Kingdom buses drop off right at Main Gate, thereby avoiding Car Park and Charges, Line for Tram to Transportation Center, then another Line for Ferry or Monorail to Main Entrance which can add up to an hour each way at Peak Times. Also staying at Disney gives you longer Park hours.

Then plan your days and prebook Enterprise Car Rental at WDW and and do 2 or 3 Day hire for Off property visits.

Car Rental at MCO starts sounding cheap but with all the extras it soon mounts up and you end up paying $40 a day rental and extras whilst its sitting in a Theme Park or Hotel Car Park for most of the day.