Editing problems and noise problems are different, D.
I guess most of us here do what we can to make things sound better. I just did yesterday with an interview clip done near the Bosporus Strait. I have no clue where the mic was, maybe on the camera. Had it been an internal shot the noise would have been about early room reflections. Because the scene was shot outside, I was able to use Izotope's RX within FCP to pull the voice up from the background noise.
MM a wedding vid is a long thing. Id suggest downloading Izotopes RX demo and see if that can help. I find it excellent as you teach it what you consider to be bg noise.
If it helps youll need to acquire the non demo version.