Thinking about it is the first step to doing it. So, it seems to me you are already working up to declaring yourself and you will do it when the time seems right to you. You'll feel a lot better, although it may open that can of worms you mention. Still, even with the hassle, it feels good to be authentic and to tell the truth.
As for the kids, tell them the truth too. You no longer believe. Let them know when they are old enough they can choose for themselves, too, and in the meantime not to worry about it. If the JWs frighten them with armageddon, tell the kids the truth about that too. You don't really believe you are in any danger, nor are they.