Thanks to everyone who has offered advice and support, and I am humbled by the general vote of confidence expressed in my ability to carry off this job.

However, my initial excitement has given way to absolute terror, and I am inclined to not do it after all.

I also posted my original post on a photography forum to which I belong, and the almost unanimous response is that I should not even contemplate something like this, without having done at least a few stints as an assistant photographer to a pro.

The last thing I want to do is not meet the expectations of the bridal couple, in spite of their pleading that I will be ok.

I'm not sure if any of you have picked up that I don't take many pictures of people - perhaps that is an indication that this kind of photography is not my strength?