I did a wedding as a favour 6 years ago. I was asked due to the photo equipment I had. On the day of the wedding, a guest, who had previously said he could not attend,arrived, and he was a retired wedding photographer. The biggest skill required is arranging the groups, and MAKING THEM DO AS THEY ARE TOLD, and holding them until you get the shot(s). He did all the arranging, and it is something I would have been lost at. When he took a shot I did likewise. I was very pleased with what I had achieved, but the credit must go to him for all the arranging, etc. He was using a Canon 350D, + a compact digital for backup. I used a Canon EOS 5, and EOS1nHS. Comparing the results later I thought that the film shots had the edge over the digital prints, but that was 6 years ago. Best of luck, if you go ahead. I would suggest you write out a list/schedule, eg. bride at home, arriving at church, etc. Then after the wedding - bride and groom; then with bridesmaids, best man; with parents of one, then the other; then all together. etc.,etc. Hope all goes well.