We have almost the same dates, we are going Mar 4-10. I thought about telling the kids at Christmas too but kind of want their help before doing FP+ on Jan 3 so we shall see what we decide!
I did just book Mickeys Backyard BBQ as I think my kids are the perfect age for it. (8, 6, 4,2)
This will most likely be our last deluxe stay (WL) because after this trip we will have 4 kids over the age of 3 and then finding affordable options is tough. So I wanted to make it a relaxed stay but there's so many new things we want to do at the parks it's hard to balance them all!