We got this little girl last September, then in December we got a great grandson, so, being a backpacking family, better carriers went on the wish list. Grandma and I were out of town sitting in a restaurant and next door was a sporting goods store. So we made the mistake of wandering in "just to look". First thing I saw was child carrier backpacks, the second thing I saw was a 40 % off sign right below them. I told grandma we had to have one so the kids could use it for their little ones. She said NO, gotta have two or we'll have real problems so we bought two. They had both Kelty and Osprey packs available. We chose the Kelty Pathfinder 3 model because it had by far the biggest additional capacity, the hood, and a change pad. Besides the child, the pack has about 2000ci capacity as well as the stand to attach extra stuff to. The back part of the pack zips off as a day pack, making it that much more serviceable. In the second picture, I am carrying the day pack that zips onto the back of the carrier pack.
We'll be doing a 4 day 4 generation trip into the Sawtooths with my great grandson in August.