It depends on the strength of your application. I live with my husband and we dated for almost two years before getting married. We sent in 11 photos total for our entire relationship. (We also aren't social people or enjoy having our pictures taken.)
As far as the wedding goes, I would send pictures with parents, siblings, and other family members, but parents and siblings are the most important. Other family members or the minister/priest/judge/comissioner are good too. However, you don't need to send in 13 pictures of you with you parents. That's excessive.
I would send 1-2 pictures from a trip. If you have standing in front of a landmark, that helps show you were definitely there

Even the hotel sign works.
So the real answer is - it depends on what you think is best. Look at your entire application and decide what you need.