You have a family of 6? Then it is time to evaluate.
A 6 seater means filling the 6 seats at reduced fuel load. => 6 people + luggage means you have to reduce fuel load dramatically, and range reduces to a hop to the next town..
Plus: 6 people in a 6 seater + minimal luggage => means very precise Center of Gravity calculations at take off, but also when the fuel is burned off for landing.
For all practical, and safety reasons, if you want to fly 6 people, with luggage over any distance? You need the load capacity, and center of gravity margins of a 10 seater.