I'm not sure about the 8 seater SUV's but we've hired quite a few 7 seater SUV's. We've had 2 seats in the front, then a row of 3 then a row of 2, however that back row is really uncomfortable for an adult as there is no drop down for your legs. We've only ever hired them for 5 of us so we always drop the back 2 seats down to make room for our luggage. For 6 adults I think you'd be more comfortable in a 7 seater minivan.