MY DH and I had my huge suitcase, 2 what would be lg size in newer luggage sets, a laptop and stuffed backpack, a carry on bag all in back and had no issues what so ever and this was with just putting stuff in there not really packing it nice. I'd say with 2 adults and 3 kids it would be tight in room all the way around. The equinox is like a hondra crv/saturn vue/ small blazer type.