We're doing a month long road trip in July 3 adults and a 16 year old. We've booked an SUV rental but wondering if an mpv would be better for taking us and our luggage around. We are driving Vegas, Grand Canyon south rim before coming to monument valley and staying at the view. We've booked a guided tour but what I wondered was about the roads into and up to the view. Which vehicle would be best do you think?