u better post in the guitar rookie corner to get more attention...anyway bout ur qns, i guess super glue is not really gonna help in the long run as each strings is tensioned to more than 10 kg...so it'll snap the moment u drop it, unless u trust the elephant
but anyway, i've got no experience in this, but glue is not enough. you still need to clamp the crack tightly to get the glue to bond properly with the wood, otherwise it may just 're-crack'