hibernating only writes memory that is in use out the hiberfil file. so yes it will save wear on the SSD.
but I hibernate my notebook several times a day with stuff open as thats the whole point to me. take up where you left off without reopening stuff. that notebook has my 6 year old intel X25 M 80 gig drive that has gone through 4 systems and still is at 90% life.
Im at the point that I dont treat my SSDs any different from spinners. page file, temp files, work files, documents, all are on SSDs. speed is the whole point of them. use them. dont baby them.
odds are it will be obsolete before it wears out. just back them up (as you should any drive).