I just want to point out that even if you did have a lot of presents for them to open, there is absolutely no need to take them and then bring them back. I'm going to assume they'll have presents to open when they're older, don't make it harder on yourself by carting their presents around to other people's houses. Just have them open them on Christmas morning before you leave.
They literally will not even know what is happening 😂
You could wrap their laundry and it would be the same thing for them. You do not need to take presents to somewhere else, its really for the pictures at that age anyways. If you did want to wrap a few things for them for the pictures do it when you get home but no need.
Our toddler got so overwhelmed his first 2 Christmas’s. This is his first one he’s actually excited about. We even have a couple wrapped presents from his first year still 😆. You’re fine!! They’ll get stuff from everyone else.