You can set up a trust and have a lawyer accept it to keep you anonymous, even in public winner states. Obviously you buy the ticket when it’s at 1 billion+. Now you invest it after taxes and live off 20 mill+ yearly yield.

You start a hands off small business to launder your own legal money. This is how you explain to your family that you were able to build a small modest home at least an hour away - just far enough to be inconvenient but not impossible for family to visit. Your real home is a custom built stone castle just over the hill in your back yard. You build a tunnel connecting them in case family drops in unannounced.

Or just do the first part and fake your own death. Depends on your relationship with family and friends.