Hi folks, I am trying to rent a large (7 passenger) SUV for a family vacation this spring, from a small Midwest airport location (see my username

).
On the website, the largest car available at this location is the standard SUV (class L). However, when I drive by the Hertz lot at the airport, they have several GMC Yukons, Escalades, even a QX60. I think I counted more than 5.
Even if I try to make the reservation for tomorrow for 1 day, the vehicles types don't show up. Other than stopping by the reservation desk at the airport, is there something I can do get a rental quote for these larger SUV's?
Thanks