Has anyone here strapped a Kelty JOURNEY PERFECTFIT child carrier or any other child carrier to the K4 frame. Any tips? I've got a 2 month old that I plan to throw on my back as part of my training for an Elk hunt this fall. I've ordered the K4 pack system and I plan to order a Kelty child carrier unless y'all convince me to use a different one. Would the crib load panel be useful for this?