Memorials set up at weddings for loved ones who can't be there?

We are getting married on my grandma's birthday. Originally I was just going to set up a memorial with her picture only, however other family members are telling me that I should include my Grandpa and Aunt. If I were to do that my fiance would have to add his grandparents (2). He says that It may get to a point where it would just be depressing with all of these people's pictures at the wedding...

Should I...

1) only put up a picture of my grandma?

2) put five or six pictures up of both of our family members that have passed?

3) Other?