Very nice OP, GT; it’s nice to think about family gatherings, esp. those of my childhood, at this time of year. Thanks. 
My maternal grandparents were always my favorites to visit, and were the ones I was closest to. Their place was sorta small, though, so we all had to double (and triple!) up when we stayed there. They did have a -huge- yard, though, so there was always room to play outside. We always visited my Mom’s relatives too, they all lived pretty close together; my great grandparents had a large house & yard, and we loved going there. Except for Mom Mom’s parrot, Pol. lol We were all pretty scared of her. Sometimes, the grandparents came to visit us, which I also enjoyed. I was the first grandchild, so I suppose they probably spoiled me … a bit. 
My paternal grandparents I only have vague memories of; we only visited them a few times; the last time I remember, 1959, my Dad had a big bust-up with his mother–we didn’t return for many years after that; his Dad passed away in 1961 and his Mom in 1966. There were plenty of cousins, though, and some family lived on farms (I remember bringing home some pea hen eggs that I wanted my Mom to serve me for breakfast … I think she served up regular eggs and told me it was the pea hen eggs LOL), so there was some fun to be had. His brothers and sisters got together for years, sometimes at Thanksgiving, and then more recently they had regular reunions on Labor Day weekend. I took my oldest back in 1984, when she was about 2 1/2–lots of people, all talking, much good food, and plenty of fun, although she was scared of Laddie, the old collie.
My SO’s family was never close–his Mom passed away when our daughter was only 9 months old; he was very close to his mother, but not so much to his father. He would go months and months without any contact w/his Dad or his brother or sister, but then when they were together, they’d reminisce for hours! His brother (2 yrs. older) passed away back in 1999 (cancer :(), and his Dad in 2002, so it’s just he and his sister now–there are some aunts and uncles, but they don’t see them very often.
My parents were divorced in 1978, so after that, my holidays were spent sometimes with my Mom and sometimes with my Dad; Mom had a small apt. and my Dad a house, but I didn’t often visit either, esp. as my kids got older–it was too much to travel, and too expensive as well. The last time most of us were together was Thanksgiving 2003, about 5 months after my Mom’s death. We enjoyed it, and my Dad put together a true feast (yes, I helped him, as much as he would let me, that is!!), but he’s just not able to host things any more – arthritis, loss of sight in one eye; he’s just generally slowing down.
My 20 YO son will be home from college next weekend!! I haven’t seen him since early August, so I’ll certainly be glad to have him home for the holidays. I’m planning a nice feast for Christmas, but suspect I won’t see him very much as he’ll probably be spending time catching up with his “homies” here that he hasn’t seen.
Sorry for rambling on, but I guess you made me think of a lot of memories today, GT, and I do thank you for that. I’m going to call my Dad tonight to see how he’s doing. 
And Happy MMP to all - tomorrow’s Tuesday. 