We have a three bike hitch and use a Roof Bag (literally, that is the name on it : ) for extra cargo. Two adults, two kids, two dogs, three bikes, gear for a week is no problem that way... Also use the roof bag only on the Corolla when not taking bikes and it's nice to have everything up top- bag can be used with or without a roof rack and I think I paid about 60-70 bucks for it new... Worth every dollar!