On weeding group photos, it was impossible to identify for 10-15 people, so in some photos, I wrote "wedding program: picture taken with sponsor's friends; pictures taken with parents of both Sponsor and PA, pictures taken with sponsor's friends etc. I hope they will understand this.
One thing I think works best is you have a "married" status in facebook (public), send them pictures of your weeding liked by friends and families.
This is hard to fake (unless someone very professional of faking stuffs).