Very nice!
I did this with automations a few years ago.
Last year I kept it simple just using Hue and one of the lightning effects apps. The weather was terrible so I had to bring most of the lights (not outdoor rated) into the house which diminished the experience some.
New house, new neighborhood, and social distancing concerns this year mean we have no idea what the traffic will be like and not sure what we’ll do. The decorations are out, and I’ve added AtmosFX to the mix, but likely won’t do any automations. I just found out last weekend that the outdoor outlet in front doesn’t work. So no lights are going out until Halloween day, as the cords will have to come in through a window. If the weather allows, I’ll probably hang some BR30 Hue bulbs out of the upstairs windows to do lightning.