Good idea, but not in lou of a real photographer.
As mentioned, your guests are there to enjoy this special moment WITH you. not capture it for you. As "MissNatalie18" said, ask your guests if one of the would be willing to be the designated photogher, maybe one of them have a little photography under their belt but don't share it. Or find a student or amature photographer or a cheap but good quality pro. Some will only charge the cost of flight and stay.
Hope all works.
Friend of the family photographer-
I will always suggest: brendamurphyphotography.com