[jpiano]

Here's another thing you might consider. I once shot a wedding and the diaphram on my wide angle lens was sluggish. All my shots made with that lens were grossly overexposed because the lens wasn't stopping all the way down before the shutter released. This was on a medium format film camera so there was no way of knowing that I had developed a problem till the proofs came back. I was saved by a guest who took some pictures over my shoulder and captured an image that was really wanted by the B&G but blown by me. Since then, I always look at guest photographers as my backups. My wife now shoots with me and usually takes the formals from a slightly different side angle so I do have my own backup now. Sometimes they prefer her shots to mine because the subjects are not looking right into the lens.
I also get a set fee for the package the B&G order. Print sales, although wonderful, are just the gravy. Since I post my photos online where friends and family can order prints the next day, I figure most of the guests will see my pictures long before they get a chance to see any other pictures taken that day. Actually, most of the friends and family will probably never see that CD, and these are the people who will most likely purchase those extra prints. The B&G have allready purchased their prints in their print and album package.