When picking up an Alamo rental at the WDW Dolphin location, I have twice been offered what they considered to be an “upgrade”, once to a full size SUV and once to a pick-up truck, from my reserved midsize or full size sedan. I made the mistake of accepting the offered SUV the first time and hated it. The second time, I had to wait while a suitable sedan was brought over from the Disney Car Care Center location, wasting about 30-45 minutes of my time. A truck was out of the question, since my primary insurance coverage for rentals is through a third-party annual travel insurance policy that I carry (I carry it primarily for the international travel emergency medical and evacuation coverages, but the car rental insurance is a nice feature that comes with the policy). This coverage specifically excludes trucks and any passenger vehicles that carry more than 10 passengers, so that 15-passenger van would void my insurance coverage on this policy (and, to be honest, I don’t know if my regular auto insurance would cover it either, since I haven’t encountered the need). At MCO, I always do online checkin with the skip the counter feature, so I can go directly to the aisle of the garage and choose a car. I’ve not had a problem there, but the situation can be different at smaller airports and other rental locations that don’t support this service.