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If room for seats is a problem the Honda Pilot seats 8 and better MPG the the two listed above.
Have you considered an outback? They tend to be great for what it seems you are using it for and get better gas than the ford and Toyota models you are considering.
A diesel expedition might do better milage wise but there was a year that international was pumping out the power strokes to beat the new emission standards. I've heard bad things about that year of engine, head bolts shearing off, things like that.