I've been getting stressed already, too. Mostly because I don't want to disappoint any of my 10 grandkids and since I can't afford expensive things for them I have to work really hard at coming up with the perfect thing I know they will each love. And then my 4 kids and their spouses - I know they don't expect much, but I want to be able to give them all something I know they will like. But on the other hand I HATE the thank you's. The last two years I'd just join in the dirty santa game - where everyone bring one gift so they don't feel like they have to get me anything and don't expect anything more from me. Then I'd sneak a Santa gift under each of their trees from Santa. They get a fun something on Christmas morning and I don't have to deal with the thank you's.
We do all try to get together for a family thing at my place. Everyone brings food, we play games and other than needing a break now and then it's great because everyone is happy, laughing and having fun and I love seeing all my kids together having a good time. And every year I keep getting a family photo (19 people - 20 if I'm in it, too) and it's not an easy task and I'm relieved if I get one good picture and next thing I know another family member is being added so we're going to have to do another one. (they keep having more babies. lol)
Anyhow - stress. But I do let my kids decide when to do our family thing so none of them are burdened or pressured into not doing their own family thing or the other side of the family thing. Christmas is the only real big deal with me and if it's not celebrated together on Christmas day, that's okay.