Every Memorial Day my mother places flowers at my father's, my step-father's, her parents, her grandparents (both sets), and many unmarried uncles and aunts. Her brothers and their spouses would always meet at the grave of their parents, drink beers and talk about the old times. I've joined them a few times and enjoy the history lessons.
Unfortunately, as my mom gets older, I don't see it continuing. She has lost two brothers, one is pretty old and unable to get around, and the other won't continue that tradition. I can find the graves of her parents, but that is about it.
Occasionally I visit the graves of my grandparents, father, and step-father. It has been a few years, but it is something I like doing. Since I live in Des Moines and they are all in Dubuque county it isn't so easy to get back that often, and when I do there are a million other things to do. As someone else mentioned the cemeteries are just really peaceful.
Two interesting stories. My grandparents in the Worthington IA cemetery, and in the spring of 1990 a tornado ripped through Worthington and destroyed some headstones and gorgeous trees. It has come back some but not like it was, but give it time I guess. My dad is buried in the Petersburg IA cemetery. On the western border of the cemetery there is a cow pasture, and my dad said before he died he did not want a plot along the fence and have those cows sh!tting on him. He got his wish.
My wife has told me that when I die she won't be visiting my grave. The whole thing creeps her out, and it isn't something she will do, but to be honest it really hurt to hear that. It made me realize how quickly people forget. I am two generations removed from my mom's aunts and uncles and I have no idea who they were or where to find their graves. That will be me someday.