I'm worried about that this year, actually. Santa brings stocking gifts only, or he MIGHT bring 1 stocking gift that's slightly too big, so it goes on the table under the stockings (this year it's a little set of bubble blowers that are for DD and DS to share). All tree presents are from family.
However, my parents and 1 brother have always gone crazily overboard, AND waited to open all of their piles and piles of presents to and from each other until we're there (one year, I invited them to our house on Christmas eve, said we'd be happy to open their presents to us and watch them open their presents from us all together, just a bit early. My brother and his gf and my Dad showed up with literally boxes and boxes and boxes of presents. They brought all of their crazy overboard piles to and from EACH OTHER to our house to open. I wanted to scream! Thank goodness DD was an infant and didn't know the difference.
They also tag every flippin thing to the kids from Santa (or "Rudolph" and "Frosty" when DD informed them that Santa doesn't bring presents under the tree). I sort of want to just let it go this year. OTOH, my mother dislikes DS (an infant, and a happy one at that!


and will probably give him noticeably less than DD, all tagged from Santa. He won't know or care, but DD will notice, and will care. Haven't figured out what I want to do about it though. We won't be there til New Year's though, so that will stop the "piles of presents unrelated to my immediate family" problem. How to keep Santa from bringing piles for the kids though, I don't know. Or maybe I'll just let it go and say Santa does things differently at Grandma's. She's not going to believe in Santa forever, yk? And Grandma might not be around too many more Christmases either.
