I'll start my own post now that I have more questions, and trying to make the heading one that others can use in a search.
I said in another post that we'd maybe come for November 4-7th in 2019, but it seems that will be too early for the decorations. We can alter plans easily enough a fair bit out of travel time, but still need to know when the decorations will be up.
If it tends to be around the 10th November, then we would travel in the week beginning Monday the 11th instead. I'm trying to plan our Disney days first- we would like to see a bit of LA this time, but can work around that either before or after Disney.
The Christmas decorations are our absolute priority. If this is our last trip, it's what we would most like to see, and like everyone, the smaller the crowd can be, the better for us. Hence considering the first weekdays of the decorations going up.
If I know when to expect, I can work on finding flights that fit in either side.