This won't be possible in most venues, and I won't have the time or gear space to mic people up myself. I suppose I am looking for best possible solution without needing to do these two things, I realise that no solution will be perfect in this set up.
Luckily I don't have to worry about video audio sync as the clips will be set to still images not video. There may be a little video thrown in, but the audio from that could be taken with my Rode Videomic which seems to do a pretty good job.
I could get the H4n pretty close to source, ie on the table or near the bride and groom at the front of the church. I guess I will have to experiment to see how that comes out.
Cheers
Cris.