We always rent a car even though we stay in the park because my husband likes the flexibility of coming and going as we please. This past december we rented a mini-van, there were us and my parents for a total of 6 with a lot of luggage and a stroller. We fit fine with room to spare. We used Alamo, we have a disney visa so I got a coupon in the mail for a percentage off and one free day so it worked out well. The thing that costs a lot is the car seat rental. Alamo is right in the airport so you just get your bags and walk across the street to the cars, very convienant. You can go online and checks the prices on the alamo website - you can also check lowestfare.com or expedia, orbitz, ect.