Keep it simple.
You normally submit a small number of photos as evidence of meeting/valid relationship. In addition, carry along more pictures to show in case they are interested during the interview.
If you have prints, just put them in a small photo album. Prints with a date stamp are even better, but not required. Hand written notations under the photos or on the back are a nice touch.
In addition to photos of you two together, include some of other family members or group shots with you in them. Also, pics of your family, your dog, your car, your home, your hometown, etc. She should be able to name the folks in the photos or describe the scene. This stuff helps show a genuine relationship.
Good luck...