Love the huge but elegant tree, set up, feel. What time of day is it? It looks perfect! Not too shady, great lighting for pictures. I have always likes these outdoor in a forest/by a tree weddings, I've just never found one that looked like my style.
Fun idea for family reunion/gathering. Having a photo booth or professional photographer to help create a photo guest book instead of just having them sign it. And picture frames are a great prop to have during your wedding party photos