For your family size, masha Allah, I would definitely recommend a sedan, that too, a corolla. I have kept a city from 2010 to 2012 and with 3 elders in the car and luggage, the ground clearance gets very low - it touches most of the speed breakers (my mother used to scream everytime that happened - hai gaddi lag gayee :p).
I now drive a corolla xli 2012 model and with 3 elders, 2 kids and a trunk full of luggage, the car still has plenty of ground clearance. We have been to shogran once and to murree/islamabad plently of times on this car with full luggage and found the ground clearance better than city's.
I understand your travel with full load would be occasional, yet, when elders are sitting in the car, they notice the smallest of unusual noises.
Please feel free to ask if you have further queries.
Sent from my Q10 using Tapatalk