with National and Hertz you are always running the risk they won't have a minivan in the aisle. Sometimes they can have 30 vehicles in the aisle sometimes just a few. Also not every location has an aisle.
i found the chabad enterprise code gave the best deals on minivans. also weekly rates are better than daily, but the last time i tried they prorated a early return.,
What if I book a regular rental hoping there will be a 7 seater in the aisle and as a back up also book a 7 seater. How will that work? If there's a minivan in the aisle will they let me use that reservation when i leave the lot instead of my 7 seater reservation?
Do car rentals ever have 8 seater minivans in their lots?