my youngest is 16 and the boys are mid 20s {no grandkids yet} so the mystery of Santa Claus isn't needed anymore.
I put lights on the pretty shaped evergreen out by our pond and just leave those out there year around- just rearrange them if needed. They reflect nicely in the water too.
The tree is so dense that you can't see the lights unless they are on.

Since we are out in the country we just do any outside deco for ourselves - that we can see looking out the main windows.
Our house is kind of small so not much room for the extra deco inside- just a few things.