There is always the photo moment on the family trip. You know where you take advantage of having your family all in one place at the same time. You have to get through all the combinations, Joe's family, Jill's Family, Grandparents with grandkids, cousins, etc. Don't forget that you have to take one photo of each pose with everyone's camera.
And of course you have to the do the timed camera, tripod, group shot so you can get everyone together. I have been talking to a number of photographers lately and I think it would be ideal to hire a professional photographer on your group trip to take advantage of having everyone together.
We are doing a family reunion in June and it would be great to have someone take some photos for us. In Travel Group Planner, I suggested this activity for our trip in the Things to Do section and started a conversation around it. 
We have all the great-grandkids with their great-grandmother.