DD is 20 mo old and 25+ lbs and counting. This time around, I'm older, and it feels harder to wear baby much longer! I've been using the Ergo, wearing baby on my back now. I am wondering if a frame backpack has any advantages - does it sit baby differently and/or make the weight feel easier? I love to hike but haven't been doing as much with my almost 2 yr old. She likes to walk, but that's a different type of hike! :) A friend is selling her Chicco frame backpack so I wondered if it might be a better option. Any thoughts or recommendations would be appreciated.