The wife and I are taking a rental SUV for the trip with our two kids. So we will have 4x4, but it will be with crappy OEM tires. Most likely a Tahoe/Suburban or a Armada(god I hope not, I hate nissan). That is the main reason. If it was actually my vehicle I would not have any issues with the tires I have on it, but that is too small for this trip with for people and two dogs.