This video also covers slight modifications to the cradle carry to enhance safety and comfort of your baby in a baby pouch sling. (babyslingsandcarriers.com)
Your comfort — is the guarantee of comfort of your baby that is why think about tandem: you take care about him, and he does not hurt you. (infobaby.org)
I would just suggest you buy a good mattress for the pack n play, for extra comfort of your baby. (omgstroller.com)