I reckon you could have a great time in one week. Just get a park pass for about 22 bucks , then park and hike up to Balor Hut. Its a great time to do it as there has been plenty of rain and the tank will be full up there. Also a very good toilet, and you could even book the hut and save weight on tents. From Balor then start up vertigo etc before tackling classics like Cornerstone rib. Your girls would walk it at that age. Just bring helmets and have fun. Basically if your prepared to camp (in a spectacular location) your good to go.