MIL here now, staying over ready for lunch tomorrow.
Younger DC were excited and I talked them through the plan for tomorrow including santa's stocking gifts when they wake up then play, bath, breakfast etc. Lunch then under the tree presents after lunch.
MIL said she's always opened all gifts first thing.
I like to spread it out so there's more to look forward to after lunch.
Of course we're doing it my way. Wondering what the popular consensus is?