Any car rental agency that rents a Toyota Sienna(mini van). I know Alamo/National rents them, but, unsure about the others.
There are a couple of other vehicles that seat 8, but, off the top of my head I cannot remember. I am sure others will post with more information.
Dreams Unlimited Travel is committed to providing you with the very best vacation planning experience possible. Our Vacation Planners are experts and will share their honest advice to help you have a magical vacation.